diff --git a/README.md b/README.md
index 8ff421f7..56f9fd9d 100644
--- a/README.md
+++ b/README.md
@@ -165,7 +165,7 @@ At least one of the `ngf-select` or `ngf-drop` are mandatory for the plugin to l
     // updateOn could be used to disable resetting on click, or updating on paste, browser image drop, etc. 
     // allowInvalid default is false could allow invalid files in the model
     // debouncing will postpone model update (miliseconds). See angular ng-model-options for more details.
-  ngf-model-invalid="invalidFilesArray" // binds the invalid selected/dropped files to this model.
+  ngf-model-invalid="invalidFile(s)" // binds the invalid selected/dropped file or files to this model.
   ng-disabled="boolean" // disables this element
   ngf-select-disabled="boolean" // default false, disables file select on this element
   ngf-drop-disabled="boolean" // default false, disables file drop on this element
@@ -342,6 +342,13 @@ Upload.http({
 /* Set the default values for ngf-select and ngf-drop directives*/
 Upload.setDefaults({ngfMinSize: 20000, ngfMaxSize:20000000, ...})
 
+// These two defaults could be decreased if you experience out of memory issues 
+// or could be increased if your app needs to show many images on the page.
+// Each image in ngf-src, ngf-background or ngf-thumbnail is stored and referenced as a blob url
+// and will only be released if the max value of the followings is reached.
+Upload.defaults.blobUrlsMaxMemory = 268435456 // default max total size of files stored in blob urls.
+Upload.defaults.blobUrlsMaxQueueSize = 200 // default max number of blob urls stored by this application.
+
 /* Convert a single file or array of files to a single or array of 
 base64 data url representation of the file(s).
 Could be used to send file in base64 format inside json to the databases */
diff --git a/demo/src/main/webapp/index.html b/demo/src/main/webapp/index.html
index 84ad0c09..f4dce640 100644
--- a/demo/src/main/webapp/index.html
+++ b/demo/src/main/webapp/index.html
@@ -205,11 +205,11 @@ <h3>
   <div class="srv-title">How to upload to the server:</div>
 
   <div class="howto">
-    <label><input type="radio" name="howToSend" ng-model="howToSend" value="1" ng-init="howToSend = 1">$upload.upload():
+    <label><input type="radio" name="howToSend" ng-model="howToSend" value="1" ng-init="howToSend = 1">Upload.upload():
       multipart/form-data upload cross browser</label>
     <br/>
     <label><input type="radio" name="howToSend" ng-model="howToSend" value="2"
-                  ng-disabled="usingFlash">$upload.http(): binary content with file's
+                  ng-disabled="usingFlash">Upload.http(): binary content with file's
       Content-Type</label>
 
     <div class="sub">Can be used to upload files directory into <a
diff --git a/demo/src/main/webapp/js/FileAPI.min.js b/demo/src/main/webapp/js/FileAPI.min.js
index dc63b215..6988d96f 100644
--- a/demo/src/main/webapp/js/FileAPI.min.js
+++ b/demo/src/main/webapp/js/FileAPI.min.js
@@ -1,4 +1,4 @@
-/*! 11.2.3 */
+/*! 12.0.0 */
 /*! FileAPI 2.0.7 - BSD | git://github.com/mailru/FileAPI.git
  * FileAPI — a set of  javascript tools for working with files. Multiupload, drag'n'drop and chunked file upload. Images: crop, resize and auto orientation by EXIF.
  */
diff --git a/demo/src/main/webapp/js/ng-file-upload-all.js b/demo/src/main/webapp/js/ng-file-upload-all.js
index d2f7f60b..54f55c6a 100644
--- a/demo/src/main/webapp/js/ng-file-upload-all.js
+++ b/demo/src/main/webapp/js/ng-file-upload-all.js
@@ -3,7 +3,7 @@
  * progress, resize, thumbnail, preview, validation and CORS
  * FileAPI Flash shim for old browsers not supporting FormData
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 (function () {
@@ -424,7 +424,7 @@ if (!window.FileReader) {
  * AngularJS file upload directives and services. Supoorts: file upload/drop/paste, resume, cancel/abort,
  * progress, resize, thumbnail, preview, validation and CORS
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
@@ -445,7 +445,7 @@ if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
 
 var ngFileUpload = angular.module('ngFileUpload', []);
 
-ngFileUpload.version = '11.2.3';
+ngFileUpload.version = '12.0.0';
 
 ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http, $q, $timeout) {
   var upload = this;
@@ -491,7 +491,7 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
     if (!config.disableProgress) {
       config.headers.__setXHR_ = function () {
         return function (xhr) {
-          if (!xhr) return;
+          if (!xhr || !xhr.upload || !xhr.upload.addEventListener) return;
           config.__XHR = xhr;
           if (config.xhrFn) config.xhrFn(xhr);
           xhr.upload.addEventListener('progress', function (e) {
@@ -769,11 +769,11 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
   this.translateScalars = function (str) {
     if (angular.isString(str)) {
       if (str.search(/kb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000);
+        return parseFloat(str.substring(0, str.length - 2) * 1024);
       } else if (str.search(/mb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1048576);
       } else if (str.search(/gb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1073741824);
       } else if (str.search(/b/i) === str.length - 1) {
         return parseFloat(str.substring(0, str.length - 1));
       } else if (str.search(/s/i) === str.length - 1) {
@@ -897,7 +897,8 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
     var param = upload.attrGetter('ngfResize', attr, scope);
     if (!param || !angular.isObject(param) || !upload.isResizeSupported() || !files.length) return upload.emptyPromise();
     var promises = [upload.emptyPromise()];
-    angular.forEach(files, function (f, i) {
+
+    function handleFile(f, i) {
       if (f.type.indexOf('image') === 0) {
         if (param.pattern && !upload.validatePattern(f, param.pattern)) return;
         var promise = upload.resize(f, param.width, param.height, param.quality,
@@ -913,43 +914,20 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           f.$errorParam = (e ? (e.message ? e.message : e) + ': ' : '') + (f && f.name);
         });
       }
-    });
-    return $q.all(promises);
-  }
+    }
 
-  function handleKeep(files, prevFiles, attr, scope) {
-    var dupFiles = [];
-    var keep = upload.attrGetter('ngfKeep', attr, scope);
-    if (keep) {
-      var hasNew = false;
-
-      if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
-        var len = prevFiles.length;
-        if (files) {
-          for (var i = 0; i < files.length; i++) {
-            for (var j = 0; j < len; j++) {
-              if (files[i].name === prevFiles[j].name) {
-                dupFiles.push(files[i]);
-                break;
-              }
-            }
-            if (j === len) {
-              prevFiles.push(files[i]);
-              hasNew = true;
-            }
-          }
-        }
-        files = prevFiles;
-      } else {
-        files = prevFiles.concat(files || []);
-      }
+    for (var i = 0; i < files.length; i++) {
+      handleFile(files[i], i);
     }
-    return {files: files, dupFiles: dupFiles, keep: keep};
+    return $q.all(promises);
   }
 
   upload.updateModel = function (ngModel, attr, scope, fileChange, files, evt, noDelay) {
     function update(files, invalidFiles, newFiles, dupFiles, isSingleModel) {
+      attr.$$ngfPrevValidFiles = files;
+      attr.$$ngfPrevInvalidFiles = invalidFiles;
       var file = files && files.length ? files[0] : null;
+      var invalidFile = invalidFiles && invalidFiles.length ? invalidFiles[0] : null;
 
       if (ngModel) {
         upload.applyModelValidation(ngModel, files);
@@ -963,6 +941,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           $newFiles: newFiles,
           $duplicateFiles: dupFiles,
           $invalidFiles: invalidFiles,
+          $invalidFile: invalidFile,
           $event: evt
         });
       }
@@ -970,7 +949,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       var invalidModel = upload.attrGetter('ngfModelInvalid', attr);
       if (invalidModel) {
         $timeout(function () {
-          $parse(invalidModel).assign(scope, invalidFiles);
+          $parse(invalidModel).assign(scope, isSingleModel ? invalidFile : invalidFiles);
         });
       }
       $timeout(function () {
@@ -978,83 +957,128 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       });
     }
 
-    var newFiles = files;
-    var prevFiles = ngModel && ngModel.$modelValue && (angular.isArray(ngModel.$modelValue) ?
-        ngModel.$modelValue : [ngModel.$modelValue]);
-    prevFiles = (prevFiles || attr.$$ngfPrevFiles || []).slice(0);
-    var keepResult = handleKeep(files, prevFiles, attr, scope);
-    files = keepResult.files;
-    var dupFiles = keepResult.dupFiles;
-    var isSingleModel = !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr) && !keepResult.keep;
+    var allNewFiles, dupFiles = [], prevValidFiles, prevInvalidFiles,
+      invalids = [], valids = [];
 
-    attr.$$ngfPrevFiles = files;
+    function removeDuplicates() {
+      function equals(f1, f2) {
+        return f1.name === f2.name && (f1.$ngfOrigSize || f1.size) === (f2.$ngfOrigSize || f2.size) &&
+          f1.type === f2.type;
+      }
 
-    if (keepResult.keep && (!newFiles || !newFiles.length)) return;
+      function isInPrevFiles(f) {
+        var j;
+        for (j = 0; j < prevValidFiles.length; j++) {
+          if (equals(f, prevValidFiles[j])) {
+            return true;
+          }
+        }
+        for (j = 0; j < prevInvalidFiles.length; j++) {
+          if (equals(f, prevInvalidFiles[j])) {
+            return true;
+          }
+        }
+        return false;
+      }
 
-    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
-      $files: files,
-      $file: files && files.length ? files[0] : null,
-      $duplicateFiles: dupFiles,
-      $event: evt
-    });
+      if (files) {
+        allNewFiles = [];
+        dupFiles = [];
+        for (var i = 0; i < files.length; i++) {
+          if (isInPrevFiles(files[i])) {
+            dupFiles.push(files[i]);
+          } else {
+            allNewFiles.push(files[i]);
+          }
+        }
+      }
+    }
+
+    function toArray(v) {
+      return angular.isArray(v) ? v : [v];
+    }
 
-    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
-    var invalids = [];
     function separateInvalids() {
-      var valids = [];
-      angular.forEach(files, function (file) {
+      valids = [];
+      invalids = [];
+      angular.forEach(allNewFiles, function (file) {
         if (file.$error) {
           invalids.push(file);
         } else {
           valids.push(file);
         }
       });
-      files = valids;
     }
 
-    upload.validate(newFiles, ngModel, attr, scope).then(function () {
+    function resizeAndUpdate() {
+      function updateModel() {
+        $timeout(function () {
+          update(keep ? prevValidFiles.concat(valids) : valids,
+            keep ? prevInvalidFiles.concat(invalids) : invalids,
+            files, dupFiles, isSingleModel);
+        }, options && options.debounce ? options.debounce.change || options.debounce : 0);
+      }
+
+      resize(validateAfterResize ? allNewFiles : valids, attr, scope).then(function () {
+        if (validateAfterResize) {
+          upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
+            separateInvalids();
+            updateModel();
+          });
+        } else {
+          updateModel();
+        }
+      }, function (e) {
+        throw 'Could not resize files ' + e;
+      });
+    }
+
+    prevValidFiles = attr.$$ngfPrevValidFiles || [];
+    prevInvalidFiles = attr.$$ngfPrevInvalidFiles || [];
+    if (ngModel && ngModel.$modelValue) {
+      prevValidFiles = toArray(ngModel.$modelValue);
+    }
+
+    var keep = upload.attrGetter('ngfKeep', attr, scope);
+    allNewFiles = (files || []).slice(0);
+    if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
+      removeDuplicates(attr, scope);
+    }
+
+    var isSingleModel = !keep && !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr);
+
+    if (keep && !allNewFiles.length) return;
+
+    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
+      $files: files,
+      $file: files && files.length ? files[0] : null,
+      $newFiles: allNewFiles,
+      $duplicateFiles: dupFiles,
+      $event: evt
+    });
+
+    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
+
+    var allLength = allNewFiles.length + prevValidFiles.length + prevInvalidFiles.length;
+    var options = upload.attrGetter('ngModelOptions', attr, scope);
+    upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
       if (noDelay) {
-        update(files, [], newFiles, dupFiles, isSingleModel);
+        update(allNewFiles, [], files, dupFiles, isSingleModel);
       } else {
-        var options = upload.attrGetter('ngModelOptions', attr, scope);
         if ((!options || !options.allowInvalid) && !validateAfterResize) {
           separateInvalids();
+        } else {
+          valids = allNewFiles;
         }
-        var fixOrientation = upload.emptyPromise(files);
         if (upload.attrGetter('ngfFixOrientation', attr, scope) && upload.isExifSupported()) {
-          fixOrientation = applyExifRotations(files, attr, scope);
-        }
-        fixOrientation.then(function () {
-          function updateModel() {
-            $timeout(function () {
-              update(files, invalids, newFiles, dupFiles, isSingleModel);
-            }, options && options.debounce ? options.debounce.change || options.debounce : 0);
-          }
-          resize(files, attr, scope).then(function () {
-            if (validateAfterResize) {
-              upload.validate(files, ngModel, attr, scope).then(function () {
-                separateInvalids();
-                updateModel();
-              });
-            } else {
-              updateModel();
-            }
-          }, function (e) {
-            throw 'Could not resize files ' + e;
+          applyExifRotations(valids, attr, scope).then(function () {
+            resizeAndUpdate();
           });
-        });
+        } else {
+          resizeAndUpdate();
+        }
       }
     });
-
-    // cleaning object url memories
-    var l = prevFiles.length;
-    while (l--) {
-      var prevFile = prevFiles[l];
-      if (window.URL && prevFile.blobUrl) {
-        URL.revokeObjectURL(prevFile.blobUrl);
-        delete prevFile.blobUrl;
-      }
-    }
   };
 
   return upload;
@@ -1347,7 +1371,20 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
             }
             $timeout(function () {
               file.$ngfBlobUrl = url;
-              if (url) deferred.resolve(url, file);
+              if (url) {
+                deferred.resolve(url, file);
+                upload.blobUrls = upload.blobUrls || [];
+                upload.blobUrlsTotalSize = upload.blobUrlsTotalSize || 0;
+                upload.blobUrls.push({url: url, size: file.size});
+                upload.blobUrlsTotalSize += file.size || 0;
+                var maxMemory = upload.defaults.blobUrlsMaxMemory || 268435456;
+                var maxLength = upload.defaults.blobUrlsMaxQueueSize || 200;
+                while ((upload.blobUrlsTotalSize > maxMemory || upload.blobUrls.length > maxLength) && upload.blobUrls.length > 1) {
+                  var obj = upload.blobUrls.splice(0, 1)[0];
+                  URL.revokeObjectURL(obj.url);
+                  upload.blobUrlsTotalSize -= obj.size;
+                }
+              }
             });
           } else {
             var fileReader = new FileReader();
@@ -1355,6 +1392,9 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
               $timeout(function () {
                 file.$ngfDataUrl = e.target.result;
                 deferred.resolve(e.target.result, file);
+                $timeout(function () {
+                  delete file.$ngfDataUrl;
+                }, 1000);
               });
             };
             fileReader.onerror = function () {
@@ -1367,7 +1407,7 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
           }
         } else {
           $timeout(function () {
-            file[disallowObjectUrl ? 'dataUrl' : 'blobUrl'] = '';
+            file[disallowObjectUrl ? '$ngfDataUrl' : '$ngfBlobUrl'] = '';
             deferred.reject();
           });
         }
@@ -1598,7 +1638,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           if (files && !angular.isArray(files)) {
             files = [files];
           }
-          upload.validate(files, ngModel, attr, scope).then(function () {
+          upload.validate(files, files ? files.length : 0, ngModel, attr, scope).then(function () {
             upload.applyModelValidation(ngModel, files);
           });
         }
@@ -1639,7 +1679,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
     return val;
   };
 
-  upload.validate = function (files, ngModel, attr, scope) {
+  upload.validate = function (files, allLength, ngModel, attr, scope) {
     ngModel = ngModel || {};
     ngModel.$ngfValidations = ngModel.$ngfValidations || [];
 
@@ -1667,6 +1707,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
             if (val != null) {
               if (!fn(file, val)) {
                 file.$error = name;
+                (file.$errorMessages = (file.$errorMessages || {})).name = true;
                 file.$errorParam = val;
                 files.splice(i, 1);
                 valid = false;
@@ -1680,16 +1721,15 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
       }
     }
 
-    var filesLength = files.length;
     validateSync('maxFiles', null, function (file, val) {
-      return filesLength <= val;
+      return allLength <= val;
     });
     validateSync('pattern', null, upload.validatePattern);
     validateSync('minSize', 'size.min', function (file, val) {
-      return file.size >= upload.translateScalars(val);
+      return file.size + 0.1 >= upload.translateScalars(val);
     });
     validateSync('maxSize', 'size.max', function (file, val) {
-      return file.size <= upload.translateScalars(val);
+      return file.size - 0.1 <= upload.translateScalars(val);
     });
     var totalSize = 0;
     validateSync('maxTotalSize', null, function (file, val) {
@@ -1715,6 +1755,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           asyncFn(file, val).then(function (d) {
             if (!fn(d, val)) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -1723,6 +1764,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           }, function () {
             if (attrGetter('ngfValidateForce', {$file: file})) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -2046,7 +2088,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     return deferred.promise;
   };
 
-  upload.dataUrltoBlob = function (dataurl, name) {
+  upload.dataUrltoBlob = function (dataurl, name, origSize) {
     var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
       bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
     while (n--) {
@@ -2054,6 +2096,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     }
     var blob = new window.Blob([u8arr], {type: mime});
     blob.name = name;
+    blob.$ngfOrigSize = origSize;
     return blob;
   };
 
@@ -2089,7 +2132,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               setTimeout(function () {throw e;}, 1);
             }
           }
-          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name));
+          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name, file.size));
         }, function (r) {
           if (r === 'resizeIf') {
             deferred.resolve(file);
@@ -2213,12 +2256,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       if (stopPropagation(scope)) evt.stopPropagation();
       if (actualDragOverClass) elem.removeClass(actualDragOverClass);
       actualDragOverClass = null;
-      extractFiles(evt, attrGetter('ngfAllowDir', scope) !== false,
+      var items = evt.dataTransfer.items;
+      var html;
+      try {
+        html = evt.dataTransfer && evt.dataTransfer.getData && evt.dataTransfer.getData('text/html');
+      } catch (e) {/* Fix IE11 that throw error calling getData */
+      }
+
+      extractFiles(items, evt.dataTransfer.files, attrGetter('ngfAllowDir', scope) !== false,
         attrGetter('multiple') || attrGetter('ngfMultiple', scope)).then(function (files) {
         if (files.length) {
           updateModel(files, evt);
         } else {
-          extractFilesFromHtml('dropUrl', evt.dataTransfer).then(function (files) {
+          extractFilesFromHtml('dropUrl', html).then(function (files) {
             updateModel(files, evt);
           });
         }
@@ -2262,12 +2312,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       upload.updateModel(ngModel, attr, scope, attrGetter('ngfChange') || attrGetter('ngfDrop'), files, evt);
     }
 
-    function extractFilesFromHtml(updateOn, obj) {
-      var html;
-      try {
-        html = (obj && obj.getData && obj.getData('text/html'));
-      } catch (e) {/* Fix IE11 that throw error calling getData */
-      }
+    function extractFilesFromHtml(updateOn, html) {
       if (!upload.shouldUpdateOn(updateOn, attr, scope) || !html) return upload.rejectPromise([]);
       var urls = [];
       html.replace(/<(img src|img [^>]* src) *=\"([^\"]*)\"/gi, function (m, n, src) {
@@ -2317,18 +2362,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       callback(dClass);
     }
 
-    function extractFiles(evt, allowDir, multiple) {
+    function extractFiles(items, fileList, allowDir, multiple) {
       var maxFiles = upload.getValidationAttr(attr, scope, 'maxFiles') || Number.MAX_VALUE;
       var maxTotalSize = upload.getValidationAttr(attr, scope, 'maxTotalSize') || Number.MAX_VALUE;
       var includeDir = attrGetter('ngfIncludeDir', scope);
       var files = [], totalSize = 0;
+
       function traverseFileTree(entry, path) {
         var defer = $q.defer();
         if (entry != null) {
           if (entry.isDirectory) {
             var promises = [upload.emptyPromise()];
             if (includeDir) {
-              var file = {type : 'directory'};
+              var file = {type: 'directory'};
               file.name = file.path = (path || '') + entry.name + entry.name;
               files.push(file);
             }
@@ -2338,7 +2384,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               dirReader.readEntries(function (results) {
                 try {
                   if (!results.length) {
-                    angular.forEach(entries.slice(0), function(e) {
+                    angular.forEach(entries.slice(0), function (e) {
                       if (files.length <= maxFiles && totalSize <= maxTotalSize) {
                         promises.push(traverseFileTree(e, (path ? path : '') + entry.name + '/'));
                       }
@@ -2383,7 +2429,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var promises = [upload.emptyPromise()];
 
-      var items = evt.dataTransfer.items;
       if (items && items.length > 0 && $location.protocol() !== 'file') {
         for (var i = 0; i < items.length; i++) {
           if (items[i].webkitGetAsEntry && items[i].webkitGetAsEntry() && items[i].webkitGetAsEntry().isDirectory) {
@@ -2405,7 +2450,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
             (!multiple && files.length > 0)) break;
         }
       } else {
-        var fileList = evt.dataTransfer.files;
         if (fileList != null) {
           for (var j = 0; j < fileList.length; j++) {
             var file = fileList.item(j);
@@ -2421,12 +2465,12 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var defer = $q.defer();
       $q.all(promises).then(function () {
-        if (!multiple) {
+        if (!multiple && !includeDir) {
           var i = 0;
-          while (files.length && files[i].type === 'directory') i++;
+          while (files[i] && files[i].type === 'directory') i++;
           defer.resolve([files[i]]);
         } else {
-            defer.resolve(files);
+          defer.resolve(files);
         }
       }, function (e) {
         defer.reject(e);
diff --git a/demo/src/main/webapp/js/ng-file-upload-all.min.js b/demo/src/main/webapp/js/ng-file-upload-all.min.js
index 159ca7c9..c3834467 100644
--- a/demo/src/main/webapp/js/ng-file-upload-all.min.js
+++ b/demo/src/main/webapp/js/ng-file-upload-all.min.js
@@ -1,4 +1,4 @@
-/*! 11.2.3 */
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b=e(b),b.transformRequest=b.transformRequest||function(b){return window.ArrayBuffer&&b instanceof window.ArrayBuffer||b instanceof window.Blob?b:a.defaults.transformRequest[0].apply(this,arguments)},b._chunkSize=f.translateScalars(b.resumeChunkSize),b._chunkSize=b._chunkSize?parseInt(b._chunkSize.toString()):null,d(b)},this.translateScalars=function(a){if(angular.isString(a)){if(a.search(/kb/i)===a.length-2)return parseFloat(1e3*a.substring(0,a.length-2));if(a.search(/mb/i)===a.length-2)return parseFloat(1e6*a.substring(0,a.length-2));if(a.search(/gb/i)===a.length-2)return parseFloat(1e9*a.substring(0,a.length-2));if(a.search(/b/i)===a.length-1)return parseFloat(a.substring(0,a.length-1));if(a.search(/s/i)===a.length-1)return parseFloat(a.substring(0,a.length-1));if(a.search(/m/i)===a.length-1)return parseFloat(60*a.substring(0,a.length-1));if(a.search(/h/i)===a.length-1)return parseFloat(3600*a.substring(0,a.length-1))}return a},this.urlToBlob=function(c){var d=b.defer();return 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h=i.resize(d,e.width,e.height,e.quality,e.type,e.ratio,e.centerCrop,function(a,e){return i.attrGetter("ngfResizeIf",b,c,{$width:a,$height:e,$file:d})},e.restoreExif!==!1);f.push(h),h.then(function(b){a.splice(g,1,b)},function(a){d.$error="resize",d.$errorParam=(a?(a.message?a.message:a)+": ":"")+(d&&d.name)})}}),d.all(f)}function h(a,b,c,d){var e=[],f=i.attrGetter("ngfKeep",c,d);if(f){var g=!1;if("distinct"===f||i.attrGetter("ngfKeepDistinct",c,d)===!0){var h=b.length;if(a)for(var j=0;j<a.length;j++){for(var k=0;h>k;k++)if(a[j].name===b[k].name){e.push(a[j]);break}k===h&&(b.push(a[j]),g=!0)}a=b}else a=b.concat(a||[])}return{files:a,dupFiles:e,keep:f}}var i=e;return i.getAttrWithDefaults=function(a,b){if(null!=a[b])return a[b];var c=i.defaults[b];return null==c?c:angular.isString(c)?c:JSON.stringify(c)},i.attrGetter=function(b,c,d,e){var f=this.getAttrWithDefaults(c,b);if(!d)return f;try{return e?a(f)(d,e):a(f)(d)}catch(g){if(b.search(/min|max|pattern/i))return f;throw 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Uint8Array(a),d=c.byteLength,e=0;d>e;e++)b+=String.fromCharCode(c[e]);return window.btoa(b)}var e=a;return e.isExifSupported=function(){return window.FileReader&&(new FileReader).readAsArrayBuffer&&e.isResizeSupported()},e.readOrientation=function(a){var c=b.defer(),d=new FileReader,e=a.slice(0,65536);return d.readAsArrayBuffer(e),d.onerror=function(a){return c.reject(a)},d.onload=function(a){var b={orientation:1},d=new DataView(this.result);if(65496!==d.getUint16(0,!1))return c.resolve(b);for(var e=d.byteLength,f=2;e>f;){var g=d.getUint16(f,!1);if(f+=2,65505===g){if(1165519206!==d.getUint32(f+=2,!1))return c.resolve(b);var h=18761===d.getUint16(f+=6,!1);f+=d.getUint32(f+4,h);var i=d.getUint16(f,h);f+=2;for(var j=0;i>j;j++)if(274===d.getUint16(f+12*j,h)){var k=d.getUint16(f+12*j+8,h);return k>=2&&8>=k&&(d.setUint16(f+12*j+8,1,h),b.fixedArrayBuffer=a.target.result),b.orientation=k,c.resolve(b)}}else{if(65280!==(65280&g))break;f+=d.getUint16(f,!1)}}return c.resolve(b)},c.promise},e.applyExifRotation=function(a){if(0!==a.type.indexOf("image/jpeg"))return e.emptyPromise(a);var f=b.defer();return e.readOrientation(a).then(function(b){return b.orientation<2||b.orientation>8?f.resolve(a):void e.dataUrl(a,!0).then(function(g){var h=document.createElement("canvas"),i=document.createElement("img");i.onload=function(){try{h.width=b.orientation>4?i.height:i.width,h.height=b.orientation>4?i.width:i.height;var g=h.getContext("2d");c(g,b.orientation,i.width,i.height),g.drawImage(i,0,0);var j=h.toDataURL(a.type||"image/WebP",.934);j=e.restoreExif(d(b.fixedArrayBuffer),j);var k=e.dataUrltoBlob(j,a.name);f.resolve(k)}catch(l){return f.reject(l)}},i.onerror=function(){f.reject()},i.src=g},function(a){f.reject(a)})},function(a){f.reject(a)}),f.promise},e.restoreExif=function(a,b){var c={};return c.KEY_STR="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",c.encode64=function(a){var b,c,d,e,f,g="",h="",i="",j=0;do b=a[j++],c=a[j++],h=a[j++],d=b>>2,e=(3&b)<<4|c>>4,f=(15&c)<<2|h>>6,i=63&h,isNaN(c)?f=i=64:isNaN(h)&&(i=64),g=g+this.KEY_STR.charAt(d)+this.KEY_STR.charAt(e)+this.KEY_STR.charAt(f)+this.KEY_STR.charAt(i),b=c=h="",d=e=f=i="";while(j<a.length);return g},c.restore=function(a,b){a.match("data:image/jpeg;base64,")&&(a=a.replace("data:image/jpeg;base64,",""));var c=this.decode64(a),d=this.slice2Segments(c),e=this.exifManipulation(b,d);return"data:image/jpeg;base64,"+this.encode64(e)},c.exifManipulation=function(a,b){var c=this.getExifArray(b),d=this.insertExif(a,c);return new Uint8Array(d)},c.getExifArray=function(a){for(var b,c=0;c<a.length;c++)if(b=a[c],255===b[0]&225===b[1])return b;return[]},c.insertExif=function(a,b){var c=a.replace("data:image/jpeg;base64,",""),d=this.decode64(c),e=d.indexOf(255,3),f=d.slice(0,e),g=d.slice(e),h=f;return h=h.concat(b),h=h.concat(g)},c.slice2Segments=function(a){for(var b=0,c=[];;){if(255===a[b]&218===a[b+1])break;if(255===a[b]&216===a[b+1])b+=2;else{var d=256*a[b+2]+a[b+3],e=b+d+2,f=a.slice(b,e);c.push(f),b=e}if(b>a.length)break}return c},c.decode64=function(a){var b,c,d,e,f,g="",h="",i=0,j=[],k=/[^A-Za-z0-9\+\/\=]/g;k.exec(a)&&console.log("There were invalid base64 characters in the input text.\nValid base64 characters are A-Z, a-z, 0-9, NaNExpect errors in decoding."),a=a.replace(/[^A-Za-z0-9\+\/\=]/g,"");do d=this.KEY_STR.indexOf(a.charAt(i++)),e=this.KEY_STR.indexOf(a.charAt(i++)),f=this.KEY_STR.indexOf(a.charAt(i++)),h=this.KEY_STR.indexOf(a.charAt(i++)),b=d<<2|e>>4,c=(15&e)<<4|f>>2,g=(3&f)<<6|h,j.push(b),64!==f&&j.push(c),64!==h&&j.push(g),b=c=g="",d=e=f=h="";while(i<a.length);return j},c.restore(a,b)},e}]);
\ No newline at end of file
diff --git a/demo/src/main/webapp/js/ng-file-upload-shim.js b/demo/src/main/webapp/js/ng-file-upload-shim.js
index a7bf0027..1fccd6bc 100644
--- a/demo/src/main/webapp/js/ng-file-upload-shim.js
+++ b/demo/src/main/webapp/js/ng-file-upload-shim.js
@@ -3,7 +3,7 @@
  * progress, resize, thumbnail, preview, validation and CORS
  * FileAPI Flash shim for old browsers not supporting FormData
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 (function () {
diff --git a/demo/src/main/webapp/js/ng-file-upload-shim.min.js b/demo/src/main/webapp/js/ng-file-upload-shim.min.js
index 644492a7..34cb5be5 100644
--- a/demo/src/main/webapp/js/ng-file-upload-shim.min.js
+++ b/demo/src/main/webapp/js/ng-file-upload-shim.min.js
@@ -1,2 +1,2 @@
-/*! 11.2.3 */
+/*! 12.0.0 */
 !function(){function a(a,b){window.XMLHttpRequest.prototype[a]=b(window.XMLHttpRequest.prototype[a])}function b(a,b,c){try{Object.defineProperty(a,b,{get:c})}catch(d){}}if(window.FileAPI||(window.FileAPI={}),!window.XMLHttpRequest)throw"AJAX is not supported. XMLHttpRequest is not defined.";if(FileAPI.shouldLoad=!window.FormData||FileAPI.forceLoad,FileAPI.shouldLoad){var c=function(a){if(!a.__listeners){a.upload||(a.upload={}),a.__listeners=[];var b=a.upload.addEventListener;a.upload.addEventListener=function(c,d){a.__listeners[c]=d,b&&b.apply(this,arguments)}}};a("open",function(a){return function(b,d,e){c(this),this.__url=d;try{a.apply(this,[b,d,e])}catch(f){f.message.indexOf("Access is denied")>-1&&(this.__origError=f,a.apply(this,[b,"_fix_for_ie_crossdomain__",e]))}}}),a("getResponseHeader",function(a){return function(b){return this.__fileApiXHR&&this.__fileApiXHR.getResponseHeader?this.__fileApiXHR.getResponseHeader(b):null==a?null:a.apply(this,[b])}}),a("getAllResponseHeaders",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.getAllResponseHeaders?this.__fileApiXHR.getAllResponseHeaders():null==a?null:a.apply(this)}}),a("abort",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.abort?this.__fileApiXHR.abort():null==a?null:a.apply(this)}}),a("setRequestHeader",function(a){return function(b,d){if("__setXHR_"===b){c(this);var e=d(this);e instanceof Function&&e(this)}else this.__requestHeaders=this.__requestHeaders||{},this.__requestHeaders[b]=d,a.apply(this,arguments)}}),a("send",function(a){return function(){var c=this;if(arguments[0]&&arguments[0].__isFileAPIShim){var d=arguments[0],e={url:c.__url,jsonp:!1,cache:!0,complete:function(a,d){a&&angular.isString(a)&&-1!==a.indexOf("#2174")&&(a=null),c.__completed=!0,!a&&c.__listeners.load&&c.__listeners.load({type:"load",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),!a&&c.__listeners.loadend&&c.__listeners.loadend({type:"loadend",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),"abort"===a&&c.__listeners.abort&&c.__listeners.abort({type:"abort",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),void 0!==d.status&&b(c,"status",function(){return 0===d.status&&a&&"abort"!==a?500:d.status}),void 0!==d.statusText&&b(c,"statusText",function(){return d.statusText}),b(c,"readyState",function(){return 4}),void 0!==d.response&&b(c,"response",function(){return d.response});var e=d.responseText||(a&&0===d.status&&"abort"!==a?a:void 0);b(c,"responseText",function(){return e}),b(c,"response",function(){return e}),a&&b(c,"err",function(){return a}),c.__fileApiXHR=d,c.onreadystatechange&&c.onreadystatechange(),c.onload&&c.onload()},progress:function(a){if(a.target=c,c.__listeners.progress&&c.__listeners.progress(a),c.__total=a.total,c.__loaded=a.loaded,a.total===a.loaded){var b=this;setTimeout(function(){c.__completed||(c.getAllResponseHeaders=function(){},b.complete(null,{status:204,statusText:"No Content"}))},FileAPI.noContentTimeout||1e4)}},headers:c.__requestHeaders};e.data={},e.files={};for(var f=0;f<d.data.length;f++){var g=d.data[f];null!=g.val&&null!=g.val.name&&null!=g.val.size&&null!=g.val.type?e.files[g.key]=g.val:e.data[g.key]=g.val}setTimeout(function(){if(!FileAPI.hasFlash)throw'Adode Flash Player need to be installed. To check ahead use "FileAPI.hasFlash"';c.__fileApiXHR=FileAPI.upload(e)},1)}else{if(this.__origError)throw this.__origError;a.apply(c,arguments)}}}),window.XMLHttpRequest.__isFileAPIShim=!0,window.FormData=FormData=function(){return{append:function(a,b,c){b.__isFileAPIBlobShim&&(b=b.data[0]),this.data.push({key:a,val:b,name:c})},data:[],__isFileAPIShim:!0}},window.Blob=Blob=function(a){return{data:a,__isFileAPIBlobShim:!0}}}}(),function(){function a(a){return"input"===a[0].tagName.toLowerCase()&&a.attr("type")&&"file"===a.attr("type").toLowerCase()}function b(){try{var a=new ActiveXObject("ShockwaveFlash.ShockwaveFlash");if(a)return!0}catch(b){if(void 0!==navigator.mimeTypes["application/x-shockwave-flash"])return!0}return!1}function c(a){var b=0,c=0;if(window.jQuery)return jQuery(a).offset();if(a.offsetParent)do b+=a.offsetLeft-a.scrollLeft,c+=a.offsetTop-a.scrollTop,a=a.offsetParent;while(a);return{left:b,top:c}}if(FileAPI.shouldLoad){if(FileAPI.hasFlash=b(),FileAPI.forceLoad&&(FileAPI.html5=!1),!FileAPI.upload){var d,e,f,g,h,i=document.createElement("script"),j=document.getElementsByTagName("script");if(window.FileAPI.jsUrl)d=window.FileAPI.jsUrl;else if(window.FileAPI.jsPath)e=window.FileAPI.jsPath;else for(f=0;f<j.length;f++)if(h=j[f].src,g=h.search(/\/ng\-file\-upload[\-a-zA-z0-9\.]*\.js/),g>-1){e=h.substring(0,g+1);break}null==FileAPI.staticPath&&(FileAPI.staticPath=e),i.setAttribute("src",d||e+"FileAPI.min.js"),document.getElementsByTagName("head")[0].appendChild(i)}FileAPI.ngfFixIE=function(d,e,f){if(!b())throw'Adode Flash Player need to be installed. To check ahead use "FileAPI.hasFlash"';var g=function(){var b=e.parent();d.attr("disabled")?b&&b.removeClass("js-fileapi-wrapper"):(e.attr("__ngf_flash_")||(e.unbind("change"),e.unbind("click"),e.bind("change",function(a){h.apply(this,[a]),f.apply(this,[a])}),e.attr("__ngf_flash_","true")),b.addClass("js-fileapi-wrapper"),a(d)||(b.css("position","absolute").css("top",c(d[0]).top+"px").css("left",c(d[0]).left+"px").css("width",d[0].offsetWidth+"px").css("height",d[0].offsetHeight+"px").css("filter","alpha(opacity=0)").css("display",d.css("display")).css("overflow","hidden").css("z-index","900000").css("visibility","visible"),e.css("width",d[0].offsetWidth+"px").css("height",d[0].offsetHeight+"px").css("position","absolute").css("top","0px").css("left","0px")))};d.bind("mouseenter",g);var h=function(a){for(var b=FileAPI.getFiles(a),c=0;c<b.length;c++)void 0===b[c].size&&(b[c].size=0),void 0===b[c].name&&(b[c].name="file"),void 0===b[c].type&&(b[c].type="undefined");a.target||(a.target={}),a.target.files=b,a.target.files!==b&&(a.__files_=b),(a.__files_||a.target.files).item=function(b){return(a.__files_||a.target.files)[b]||null}}},FileAPI.disableFileInput=function(a,b){b?a.removeClass("js-fileapi-wrapper"):a.addClass("js-fileapi-wrapper")}}}(),window.FileReader||(window.FileReader=function(){var a=this,b=!1;this.listeners={},this.addEventListener=function(b,c){a.listeners[b]=a.listeners[b]||[],a.listeners[b].push(c)},this.removeEventListener=function(b,c){a.listeners[b]&&a.listeners[b].splice(a.listeners[b].indexOf(c),1)},this.dispatchEvent=function(b){var c=a.listeners[b.type];if(c)for(var d=0;d<c.length;d++)c[d].call(a,b)},this.onabort=this.onerror=this.onload=this.onloadstart=this.onloadend=this.onprogress=null;var c=function(b,c){var d={type:b,target:a,loaded:c.loaded,total:c.total,error:c.error};return null!=c.result&&(d.target.result=c.result),d},d=function(d){b||(b=!0,a.onloadstart&&a.onloadstart(c("loadstart",d)));var e;"load"===d.type?(a.onloadend&&a.onloadend(c("loadend",d)),e=c("load",d),a.onload&&a.onload(e),a.dispatchEvent(e)):"progress"===d.type?(e=c("progress",d),a.onprogress&&a.onprogress(e),a.dispatchEvent(e)):(e=c("error",d),a.onerror&&a.onerror(e),a.dispatchEvent(e))};this.readAsDataURL=function(a){FileAPI.readAsDataURL(a,d)},this.readAsText=function(a){FileAPI.readAsText(a,d)}});
\ No newline at end of file
diff --git a/demo/src/main/webapp/js/ng-file-upload.js b/demo/src/main/webapp/js/ng-file-upload.js
index 3ea03501..b3d6ed9e 100644
--- a/demo/src/main/webapp/js/ng-file-upload.js
+++ b/demo/src/main/webapp/js/ng-file-upload.js
@@ -2,7 +2,7 @@
  * AngularJS file upload directives and services. Supoorts: file upload/drop/paste, resume, cancel/abort,
  * progress, resize, thumbnail, preview, validation and CORS
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
@@ -23,7 +23,7 @@ if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
 
 var ngFileUpload = angular.module('ngFileUpload', []);
 
-ngFileUpload.version = '11.2.3';
+ngFileUpload.version = '12.0.0';
 
 ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http, $q, $timeout) {
   var upload = this;
@@ -69,7 +69,7 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
     if (!config.disableProgress) {
       config.headers.__setXHR_ = function () {
         return function (xhr) {
-          if (!xhr) return;
+          if (!xhr || !xhr.upload || !xhr.upload.addEventListener) return;
           config.__XHR = xhr;
           if (config.xhrFn) config.xhrFn(xhr);
           xhr.upload.addEventListener('progress', function (e) {
@@ -347,11 +347,11 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
   this.translateScalars = function (str) {
     if (angular.isString(str)) {
       if (str.search(/kb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000);
+        return parseFloat(str.substring(0, str.length - 2) * 1024);
       } else if (str.search(/mb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1048576);
       } else if (str.search(/gb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1073741824);
       } else if (str.search(/b/i) === str.length - 1) {
         return parseFloat(str.substring(0, str.length - 1));
       } else if (str.search(/s/i) === str.length - 1) {
@@ -475,7 +475,8 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
     var param = upload.attrGetter('ngfResize', attr, scope);
     if (!param || !angular.isObject(param) || !upload.isResizeSupported() || !files.length) return upload.emptyPromise();
     var promises = [upload.emptyPromise()];
-    angular.forEach(files, function (f, i) {
+
+    function handleFile(f, i) {
       if (f.type.indexOf('image') === 0) {
         if (param.pattern && !upload.validatePattern(f, param.pattern)) return;
         var promise = upload.resize(f, param.width, param.height, param.quality,
@@ -491,43 +492,20 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           f.$errorParam = (e ? (e.message ? e.message : e) + ': ' : '') + (f && f.name);
         });
       }
-    });
-    return $q.all(promises);
-  }
+    }
 
-  function handleKeep(files, prevFiles, attr, scope) {
-    var dupFiles = [];
-    var keep = upload.attrGetter('ngfKeep', attr, scope);
-    if (keep) {
-      var hasNew = false;
-
-      if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
-        var len = prevFiles.length;
-        if (files) {
-          for (var i = 0; i < files.length; i++) {
-            for (var j = 0; j < len; j++) {
-              if (files[i].name === prevFiles[j].name) {
-                dupFiles.push(files[i]);
-                break;
-              }
-            }
-            if (j === len) {
-              prevFiles.push(files[i]);
-              hasNew = true;
-            }
-          }
-        }
-        files = prevFiles;
-      } else {
-        files = prevFiles.concat(files || []);
-      }
+    for (var i = 0; i < files.length; i++) {
+      handleFile(files[i], i);
     }
-    return {files: files, dupFiles: dupFiles, keep: keep};
+    return $q.all(promises);
   }
 
   upload.updateModel = function (ngModel, attr, scope, fileChange, files, evt, noDelay) {
     function update(files, invalidFiles, newFiles, dupFiles, isSingleModel) {
+      attr.$$ngfPrevValidFiles = files;
+      attr.$$ngfPrevInvalidFiles = invalidFiles;
       var file = files && files.length ? files[0] : null;
+      var invalidFile = invalidFiles && invalidFiles.length ? invalidFiles[0] : null;
 
       if (ngModel) {
         upload.applyModelValidation(ngModel, files);
@@ -541,6 +519,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           $newFiles: newFiles,
           $duplicateFiles: dupFiles,
           $invalidFiles: invalidFiles,
+          $invalidFile: invalidFile,
           $event: evt
         });
       }
@@ -548,7 +527,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       var invalidModel = upload.attrGetter('ngfModelInvalid', attr);
       if (invalidModel) {
         $timeout(function () {
-          $parse(invalidModel).assign(scope, invalidFiles);
+          $parse(invalidModel).assign(scope, isSingleModel ? invalidFile : invalidFiles);
         });
       }
       $timeout(function () {
@@ -556,83 +535,128 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       });
     }
 
-    var newFiles = files;
-    var prevFiles = ngModel && ngModel.$modelValue && (angular.isArray(ngModel.$modelValue) ?
-        ngModel.$modelValue : [ngModel.$modelValue]);
-    prevFiles = (prevFiles || attr.$$ngfPrevFiles || []).slice(0);
-    var keepResult = handleKeep(files, prevFiles, attr, scope);
-    files = keepResult.files;
-    var dupFiles = keepResult.dupFiles;
-    var isSingleModel = !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr) && !keepResult.keep;
+    var allNewFiles, dupFiles = [], prevValidFiles, prevInvalidFiles,
+      invalids = [], valids = [];
+
+    function removeDuplicates() {
+      function equals(f1, f2) {
+        return f1.name === f2.name && (f1.$ngfOrigSize || f1.size) === (f2.$ngfOrigSize || f2.size) &&
+          f1.type === f2.type;
+      }
 
-    attr.$$ngfPrevFiles = files;
+      function isInPrevFiles(f) {
+        var j;
+        for (j = 0; j < prevValidFiles.length; j++) {
+          if (equals(f, prevValidFiles[j])) {
+            return true;
+          }
+        }
+        for (j = 0; j < prevInvalidFiles.length; j++) {
+          if (equals(f, prevInvalidFiles[j])) {
+            return true;
+          }
+        }
+        return false;
+      }
 
-    if (keepResult.keep && (!newFiles || !newFiles.length)) return;
+      if (files) {
+        allNewFiles = [];
+        dupFiles = [];
+        for (var i = 0; i < files.length; i++) {
+          if (isInPrevFiles(files[i])) {
+            dupFiles.push(files[i]);
+          } else {
+            allNewFiles.push(files[i]);
+          }
+        }
+      }
+    }
 
-    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
-      $files: files,
-      $file: files && files.length ? files[0] : null,
-      $duplicateFiles: dupFiles,
-      $event: evt
-    });
+    function toArray(v) {
+      return angular.isArray(v) ? v : [v];
+    }
 
-    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
-    var invalids = [];
     function separateInvalids() {
-      var valids = [];
-      angular.forEach(files, function (file) {
+      valids = [];
+      invalids = [];
+      angular.forEach(allNewFiles, function (file) {
         if (file.$error) {
           invalids.push(file);
         } else {
           valids.push(file);
         }
       });
-      files = valids;
     }
 
-    upload.validate(newFiles, ngModel, attr, scope).then(function () {
+    function resizeAndUpdate() {
+      function updateModel() {
+        $timeout(function () {
+          update(keep ? prevValidFiles.concat(valids) : valids,
+            keep ? prevInvalidFiles.concat(invalids) : invalids,
+            files, dupFiles, isSingleModel);
+        }, options && options.debounce ? options.debounce.change || options.debounce : 0);
+      }
+
+      resize(validateAfterResize ? allNewFiles : valids, attr, scope).then(function () {
+        if (validateAfterResize) {
+          upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
+            separateInvalids();
+            updateModel();
+          });
+        } else {
+          updateModel();
+        }
+      }, function (e) {
+        throw 'Could not resize files ' + e;
+      });
+    }
+
+    prevValidFiles = attr.$$ngfPrevValidFiles || [];
+    prevInvalidFiles = attr.$$ngfPrevInvalidFiles || [];
+    if (ngModel && ngModel.$modelValue) {
+      prevValidFiles = toArray(ngModel.$modelValue);
+    }
+
+    var keep = upload.attrGetter('ngfKeep', attr, scope);
+    allNewFiles = (files || []).slice(0);
+    if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
+      removeDuplicates(attr, scope);
+    }
+
+    var isSingleModel = !keep && !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr);
+
+    if (keep && !allNewFiles.length) return;
+
+    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
+      $files: files,
+      $file: files && files.length ? files[0] : null,
+      $newFiles: allNewFiles,
+      $duplicateFiles: dupFiles,
+      $event: evt
+    });
+
+    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
+
+    var allLength = allNewFiles.length + prevValidFiles.length + prevInvalidFiles.length;
+    var options = upload.attrGetter('ngModelOptions', attr, scope);
+    upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
       if (noDelay) {
-        update(files, [], newFiles, dupFiles, isSingleModel);
+        update(allNewFiles, [], files, dupFiles, isSingleModel);
       } else {
-        var options = upload.attrGetter('ngModelOptions', attr, scope);
         if ((!options || !options.allowInvalid) && !validateAfterResize) {
           separateInvalids();
+        } else {
+          valids = allNewFiles;
         }
-        var fixOrientation = upload.emptyPromise(files);
         if (upload.attrGetter('ngfFixOrientation', attr, scope) && upload.isExifSupported()) {
-          fixOrientation = applyExifRotations(files, attr, scope);
-        }
-        fixOrientation.then(function () {
-          function updateModel() {
-            $timeout(function () {
-              update(files, invalids, newFiles, dupFiles, isSingleModel);
-            }, options && options.debounce ? options.debounce.change || options.debounce : 0);
-          }
-          resize(files, attr, scope).then(function () {
-            if (validateAfterResize) {
-              upload.validate(files, ngModel, attr, scope).then(function () {
-                separateInvalids();
-                updateModel();
-              });
-            } else {
-              updateModel();
-            }
-          }, function (e) {
-            throw 'Could not resize files ' + e;
+          applyExifRotations(valids, attr, scope).then(function () {
+            resizeAndUpdate();
           });
-        });
+        } else {
+          resizeAndUpdate();
+        }
       }
     });
-
-    // cleaning object url memories
-    var l = prevFiles.length;
-    while (l--) {
-      var prevFile = prevFiles[l];
-      if (window.URL && prevFile.blobUrl) {
-        URL.revokeObjectURL(prevFile.blobUrl);
-        delete prevFile.blobUrl;
-      }
-    }
   };
 
   return upload;
@@ -925,7 +949,20 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
             }
             $timeout(function () {
               file.$ngfBlobUrl = url;
-              if (url) deferred.resolve(url, file);
+              if (url) {
+                deferred.resolve(url, file);
+                upload.blobUrls = upload.blobUrls || [];
+                upload.blobUrlsTotalSize = upload.blobUrlsTotalSize || 0;
+                upload.blobUrls.push({url: url, size: file.size});
+                upload.blobUrlsTotalSize += file.size || 0;
+                var maxMemory = upload.defaults.blobUrlsMaxMemory || 268435456;
+                var maxLength = upload.defaults.blobUrlsMaxQueueSize || 200;
+                while ((upload.blobUrlsTotalSize > maxMemory || upload.blobUrls.length > maxLength) && upload.blobUrls.length > 1) {
+                  var obj = upload.blobUrls.splice(0, 1)[0];
+                  URL.revokeObjectURL(obj.url);
+                  upload.blobUrlsTotalSize -= obj.size;
+                }
+              }
             });
           } else {
             var fileReader = new FileReader();
@@ -933,6 +970,9 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
               $timeout(function () {
                 file.$ngfDataUrl = e.target.result;
                 deferred.resolve(e.target.result, file);
+                $timeout(function () {
+                  delete file.$ngfDataUrl;
+                }, 1000);
               });
             };
             fileReader.onerror = function () {
@@ -945,7 +985,7 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
           }
         } else {
           $timeout(function () {
-            file[disallowObjectUrl ? 'dataUrl' : 'blobUrl'] = '';
+            file[disallowObjectUrl ? '$ngfDataUrl' : '$ngfBlobUrl'] = '';
             deferred.reject();
           });
         }
@@ -1176,7 +1216,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           if (files && !angular.isArray(files)) {
             files = [files];
           }
-          upload.validate(files, ngModel, attr, scope).then(function () {
+          upload.validate(files, files ? files.length : 0, ngModel, attr, scope).then(function () {
             upload.applyModelValidation(ngModel, files);
           });
         }
@@ -1217,7 +1257,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
     return val;
   };
 
-  upload.validate = function (files, ngModel, attr, scope) {
+  upload.validate = function (files, allLength, ngModel, attr, scope) {
     ngModel = ngModel || {};
     ngModel.$ngfValidations = ngModel.$ngfValidations || [];
 
@@ -1245,6 +1285,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
             if (val != null) {
               if (!fn(file, val)) {
                 file.$error = name;
+                (file.$errorMessages = (file.$errorMessages || {})).name = true;
                 file.$errorParam = val;
                 files.splice(i, 1);
                 valid = false;
@@ -1258,16 +1299,15 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
       }
     }
 
-    var filesLength = files.length;
     validateSync('maxFiles', null, function (file, val) {
-      return filesLength <= val;
+      return allLength <= val;
     });
     validateSync('pattern', null, upload.validatePattern);
     validateSync('minSize', 'size.min', function (file, val) {
-      return file.size >= upload.translateScalars(val);
+      return file.size + 0.1 >= upload.translateScalars(val);
     });
     validateSync('maxSize', 'size.max', function (file, val) {
-      return file.size <= upload.translateScalars(val);
+      return file.size - 0.1 <= upload.translateScalars(val);
     });
     var totalSize = 0;
     validateSync('maxTotalSize', null, function (file, val) {
@@ -1293,6 +1333,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           asyncFn(file, val).then(function (d) {
             if (!fn(d, val)) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -1301,6 +1342,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           }, function () {
             if (attrGetter('ngfValidateForce', {$file: file})) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -1624,7 +1666,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     return deferred.promise;
   };
 
-  upload.dataUrltoBlob = function (dataurl, name) {
+  upload.dataUrltoBlob = function (dataurl, name, origSize) {
     var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
       bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
     while (n--) {
@@ -1632,6 +1674,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     }
     var blob = new window.Blob([u8arr], {type: mime});
     blob.name = name;
+    blob.$ngfOrigSize = origSize;
     return blob;
   };
 
@@ -1667,7 +1710,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               setTimeout(function () {throw e;}, 1);
             }
           }
-          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name));
+          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name, file.size));
         }, function (r) {
           if (r === 'resizeIf') {
             deferred.resolve(file);
@@ -1791,12 +1834,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       if (stopPropagation(scope)) evt.stopPropagation();
       if (actualDragOverClass) elem.removeClass(actualDragOverClass);
       actualDragOverClass = null;
-      extractFiles(evt, attrGetter('ngfAllowDir', scope) !== false,
+      var items = evt.dataTransfer.items;
+      var html;
+      try {
+        html = evt.dataTransfer && evt.dataTransfer.getData && evt.dataTransfer.getData('text/html');
+      } catch (e) {/* Fix IE11 that throw error calling getData */
+      }
+
+      extractFiles(items, evt.dataTransfer.files, attrGetter('ngfAllowDir', scope) !== false,
         attrGetter('multiple') || attrGetter('ngfMultiple', scope)).then(function (files) {
         if (files.length) {
           updateModel(files, evt);
         } else {
-          extractFilesFromHtml('dropUrl', evt.dataTransfer).then(function (files) {
+          extractFilesFromHtml('dropUrl', html).then(function (files) {
             updateModel(files, evt);
           });
         }
@@ -1840,12 +1890,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       upload.updateModel(ngModel, attr, scope, attrGetter('ngfChange') || attrGetter('ngfDrop'), files, evt);
     }
 
-    function extractFilesFromHtml(updateOn, obj) {
-      var html;
-      try {
-        html = (obj && obj.getData && obj.getData('text/html'));
-      } catch (e) {/* Fix IE11 that throw error calling getData */
-      }
+    function extractFilesFromHtml(updateOn, html) {
       if (!upload.shouldUpdateOn(updateOn, attr, scope) || !html) return upload.rejectPromise([]);
       var urls = [];
       html.replace(/<(img src|img [^>]* src) *=\"([^\"]*)\"/gi, function (m, n, src) {
@@ -1895,18 +1940,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       callback(dClass);
     }
 
-    function extractFiles(evt, allowDir, multiple) {
+    function extractFiles(items, fileList, allowDir, multiple) {
       var maxFiles = upload.getValidationAttr(attr, scope, 'maxFiles') || Number.MAX_VALUE;
       var maxTotalSize = upload.getValidationAttr(attr, scope, 'maxTotalSize') || Number.MAX_VALUE;
       var includeDir = attrGetter('ngfIncludeDir', scope);
       var files = [], totalSize = 0;
+
       function traverseFileTree(entry, path) {
         var defer = $q.defer();
         if (entry != null) {
           if (entry.isDirectory) {
             var promises = [upload.emptyPromise()];
             if (includeDir) {
-              var file = {type : 'directory'};
+              var file = {type: 'directory'};
               file.name = file.path = (path || '') + entry.name + entry.name;
               files.push(file);
             }
@@ -1916,7 +1962,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               dirReader.readEntries(function (results) {
                 try {
                   if (!results.length) {
-                    angular.forEach(entries.slice(0), function(e) {
+                    angular.forEach(entries.slice(0), function (e) {
                       if (files.length <= maxFiles && totalSize <= maxTotalSize) {
                         promises.push(traverseFileTree(e, (path ? path : '') + entry.name + '/'));
                       }
@@ -1961,7 +2007,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var promises = [upload.emptyPromise()];
 
-      var items = evt.dataTransfer.items;
       if (items && items.length > 0 && $location.protocol() !== 'file') {
         for (var i = 0; i < items.length; i++) {
           if (items[i].webkitGetAsEntry && items[i].webkitGetAsEntry() && items[i].webkitGetAsEntry().isDirectory) {
@@ -1983,7 +2028,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
             (!multiple && files.length > 0)) break;
         }
       } else {
-        var fileList = evt.dataTransfer.files;
         if (fileList != null) {
           for (var j = 0; j < fileList.length; j++) {
             var file = fileList.item(j);
@@ -1999,12 +2043,12 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var defer = $q.defer();
       $q.all(promises).then(function () {
-        if (!multiple) {
+        if (!multiple && !includeDir) {
           var i = 0;
-          while (files.length && files[i].type === 'directory') i++;
+          while (files[i] && files[i].type === 'directory') i++;
           defer.resolve([files[i]]);
         } else {
-            defer.resolve(files);
+          defer.resolve(files);
         }
       }, function (e) {
         defer.reject(e);
diff --git a/demo/src/main/webapp/js/ng-file-upload.min.js b/demo/src/main/webapp/js/ng-file-upload.min.js
index a209c8cf..80d18c19 100644
--- a/demo/src/main/webapp/js/ng-file-upload.min.js
+++ b/demo/src/main/webapp/js/ng-file-upload.min.js
@@ -1,4 +1,3 @@
-/*! 11.2.3 */
-!window.XMLHttpRequest||window.FileAPI&&FileAPI.shouldLoad||(window.XMLHttpRequest.prototype.setRequestHeader=function(a){return function(b,c){if("__setXHR_"===b){var d=c(this);d instanceof Function&&d(this)}else a.apply(this,arguments)}}(window.XMLHttpRequest.prototype.setRequestHeader));var ngFileUpload=angular.module("ngFileUpload",[]);ngFileUpload.version="11.2.3",ngFileUpload.service("UploadBase",["$http","$q","$timeout",function(a,b,c){function d(d){function e(a){j.notify&&j.notify(a),k.progressFunc&&c(function(){k.progressFunc(a)})}function h(a){return null!=d._start&&g?{loaded:a.loaded+d._start,total:d._file&&d._file.size||a.total,type:a.type,config:d,lengthComputable:!0,target:a.target}:a}function i(){a(d).then(function(a){g&&d._chunkSize&&!d._finished&&d._file?(e({loaded:d._end,total:d._file&&d._file.size,config:d,type:"progress"}),f.upload(d,!0)):(d._finished&&delete d._finished,j.resolve(a))},function(a){j.reject(a)},function(a){j.notify(a)})}d.method=d.method||"POST",d.headers=d.headers||{};var j=d._deferred=d._deferred||b.defer(),k=j.promise;return d.disableProgress||(d.headers.__setXHR_=function(){return function(a){a&&(d.__XHR=a,d.xhrFn&&d.xhrFn(a),a.upload.addEventListener("progress",function(a){a.config=d,e(h(a))},!1),a.upload.addEventListener("load",function(a){a.lengthComputable&&(a.config=d,e(h(a)))},!1))}}),g?d._chunkSize&&d._end&&!d._finished?(d._start=d._end,d._end+=d._chunkSize,i()):d.resumeSizeUrl?a.get(d.resumeSizeUrl).then(function(a){d._start=d.resumeSizeResponseReader?d.resumeSizeResponseReader(a.data):parseInt((null==a.data.size?a.data:a.data.size).toString()),d._chunkSize&&(d._end=d._start+d._chunkSize),i()},function(a){throw a}):d.resumeSize?d.resumeSize().then(function(a){d._start=a,i()},function(a){throw a}):(d._chunkSize&&(d._start=0,d._end=d._start+d._chunkSize),i()):i(),k.success=function(a){return k.then(function(b){a(b.data,b.status,b.headers,d)}),k},k.error=function(a){return k.then(null,function(b){a(b.data,b.status,b.headers,d)}),k},k.progress=function(a){return k.progressFunc=a,k.then(null,null,function(b){a(b)}),k},k.abort=k.pause=function(){return d.__XHR&&c(function(){d.__XHR.abort()}),k},k.xhr=function(a){return d.xhrFn=function(b){return function(){b&&b.apply(k,arguments),a.apply(k,arguments)}}(d.xhrFn),k},f.promisesCount++,k["finally"](function(){f.promisesCount--}),k}function e(a){var b={};for(var c in a)a.hasOwnProperty(c)&&(b[c]=a[c]);return b}var f=this;f.promisesCount=0,this.isResumeSupported=function(){return window.Blob&&window.Blob instanceof Function&&(new window.Blob).slice};var g=this.isResumeSupported();this.isUploadInProgress=function(){return f.promisesCount>0},this.rename=function(a,b){return a.ngfName=b,a},this.jsonBlob=function(a){null==a||angular.isString(a)||(a=JSON.stringify(a));var b=new window.Blob([a],{type:"application/json"});return b._ngfBlob=!0,b},this.json=function(a){return angular.toJson(a)},this.isFile=function(a){return null!=a&&(a instanceof window.Blob||a.flashId&&a.name&&a.size)},this.upload=function(a,b){function c(b,c){if(b._ngfBlob)return b;if(a._file=a._file||b,null!=a._start&&g){a._end&&a._end>=b.size&&(a._finished=!0,a._end=b.size);var d=b.slice(a._start,a._end||b.size);return d.name=b.name,d.ngfName=b.ngfName,a._chunkSize&&(c.append("_chunkSize",a._chunkSize),c.append("_currentChunkSize",a._end-a._start),c.append("_chunkNumber",Math.floor(a._start/a._chunkSize)),c.append("_totalSize",a._file.size)),d}return b}function h(b,d,e){if(void 0!==d)if(angular.isDate(d)&&(d=d.toISOString()),angular.isString(d))b.append(e,d);else if(f.isFile(d)){var g=c(d,b),i=e.split(",");i[1]&&(g.ngfName=i[1].replace(/^\s+|\s+$/g,""),e=i[0]),a._fileKey=a._fileKey||e,b.append(e,g,g.ngfName||g.name)}else if(angular.isObject(d)){if(d.$$ngfCircularDetection)throw"ngFileUpload: Circular reference in config.data. Make sure specified data for Upload.upload() has no circular reference: "+e;d.$$ngfCircularDetection=!0;try{for(var j in d)if(d.hasOwnProperty(j)&&"$$ngfCircularDetection"!==j){var k=null==a.objectKey?"[i]":a.objectKey;d.length&&parseInt(j)>-1&&(k=null==a.arrayKey?k:a.arrayKey),h(b,d[j],e+k.replace(/[ik]/g,j))}}finally{delete d.$$ngfCircularDetection}}else b.append(e,d)}function i(){a._chunkSize=f.translateScalars(a.resumeChunkSize),a._chunkSize=a._chunkSize?parseInt(a._chunkSize.toString()):null,a.headers=a.headers||{},a.headers["Content-Type"]=void 0,a.transformRequest=a.transformRequest?angular.isArray(a.transformRequest)?a.transformRequest:[a.transformRequest]:[],a.transformRequest.push(function(b){var c,d=new window.FormData;b=b||a.fields||{},a.file&&(b.file=a.file);for(c in b)if(b.hasOwnProperty(c)){var e=b[c];a.formDataAppender?a.formDataAppender(d,c,e):h(d,e,c)}return d})}return b||(a=e(a)),a._isDigested||(a._isDigested=!0,i()),d(a)},this.http=function(b){return b=e(b),b.transformRequest=b.transformRequest||function(b){return window.ArrayBuffer&&b instanceof window.ArrayBuffer||b instanceof window.Blob?b:a.defaults.transformRequest[0].apply(this,arguments)},b._chunkSize=f.translateScalars(b.resumeChunkSize),b._chunkSize=b._chunkSize?parseInt(b._chunkSize.toString()):null,d(b)},this.translateScalars=function(a){if(angular.isString(a)){if(a.search(/kb/i)===a.length-2)return parseFloat(1e3*a.substring(0,a.length-2));if(a.search(/mb/i)===a.length-2)return parseFloat(1e6*a.substring(0,a.length-2));if(a.search(/gb/i)===a.length-2)return parseFloat(1e9*a.substring(0,a.length-2));if(a.search(/b/i)===a.length-1)return parseFloat(a.substring(0,a.length-1));if(a.search(/s/i)===a.length-1)return parseFloat(a.substring(0,a.length-1));if(a.search(/m/i)===a.length-1)return parseFloat(60*a.substring(0,a.length-1));if(a.search(/h/i)===a.length-1)return parseFloat(3600*a.substring(0,a.length-1))}return a},this.urlToBlob=function(c){var d=b.defer();return a({url:c,method:"get",responseType:"arraybuffer"}).then(function(a){var b=new Uint8Array(a.data),c=a.headers("content-type")||"image/WebP",e=new window.Blob([b],{type:c});d.resolve(e)},function(a){d.reject(a)}),d.promise},this.setDefaults=function(a){this.defaults=a||{}},this.defaults={},this.version=ngFileUpload.version}]),ngFileUpload.service("Upload",["$parse","$timeout","$compile","$q","UploadExif",function(a,b,c,d,e){function f(a,b,c){var e=[i.emptyPromise()];return angular.forEach(a,function(d,f){0===d.type.indexOf("image/jpeg")&&i.attrGetter("ngfFixOrientation",b,c,{$file:d})&&e.push(i.happyPromise(i.applyExifRotation(d),d).then(function(b){a.splice(f,1,b)}))}),d.all(e)}function g(a,b,c){var e=i.attrGetter("ngfResize",b,c);if(!(e&&angular.isObject(e)&&i.isResizeSupported()&&a.length))return i.emptyPromise();var f=[i.emptyPromise()];return angular.forEach(a,function(d,g){if(0===d.type.indexOf("image")){if(e.pattern&&!i.validatePattern(d,e.pattern))return;var h=i.resize(d,e.width,e.height,e.quality,e.type,e.ratio,e.centerCrop,function(a,e){return i.attrGetter("ngfResizeIf",b,c,{$width:a,$height:e,$file:d})},e.restoreExif!==!1);f.push(h),h.then(function(b){a.splice(g,1,b)},function(a){d.$error="resize",d.$errorParam=(a?(a.message?a.message:a)+": ":"")+(d&&d.name)})}}),d.all(f)}function h(a,b,c,d){var e=[],f=i.attrGetter("ngfKeep",c,d);if(f){var g=!1;if("distinct"===f||i.attrGetter("ngfKeepDistinct",c,d)===!0){var h=b.length;if(a)for(var j=0;j<a.length;j++){for(var k=0;h>k;k++)if(a[j].name===b[k].name){e.push(a[j]);break}k===h&&(b.push(a[j]),g=!0)}a=b}else a=b.concat(a||[])}return{files:a,dupFiles:e,keep:f}}var i=e;return i.getAttrWithDefaults=function(a,b){if(null!=a[b])return a[b];var c=i.defaults[b];return null==c?c:angular.isString(c)?c:JSON.stringify(c)},i.attrGetter=function(b,c,d,e){var f=this.getAttrWithDefaults(c,b);if(!d)return f;try{return e?a(f)(d,e):a(f)(d)}catch(g){if(b.search(/min|max|pattern/i))return f;throw g}},i.shouldUpdateOn=function(a,b,c){var d=i.attrGetter("ngModelOptions",b,c);return d&&d.updateOn?d.updateOn.split(" ").indexOf(a)>-1:!0},i.emptyPromise=function(){var a=d.defer(),c=arguments;return b(function(){a.resolve.apply(a,c)}),a.promise},i.rejectPromise=function(){var a=d.defer(),c=arguments;return b(function(){a.reject.apply(a,c)}),a.promise},i.happyPromise=function(a,c){var e=d.defer();return a.then(function(a){e.resolve(a)},function(a){b(function(){throw a}),e.resolve(c)}),e.promise},i.updateModel=function(c,d,e,j,k,l,m){function n(f,g,h,k,m){var n=f&&f.length?f[0]:null;c&&(i.applyModelValidation(c,f),c.$setViewValue(m?n:f)),j&&a(j)(e,{$files:f,$file:n,$newFiles:h,$duplicateFiles:k,$invalidFiles:g,$event:l});var o=i.attrGetter("ngfModelInvalid",d);o&&b(function(){a(o).assign(e,g)}),b(function(){})}function o(){var a=[];angular.forEach(k,function(b){b.$error?v.push(b):a.push(b)}),k=a}var 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a.width/a.height-f.ratioToFloat(b)>-1e-4}))),m.push(f.happyPromise(i("maxDuration","duration.max",/audio|video/,this.mediaDuration,function(a,b){return a<=f.translateScalars(b)}))),m.push(f.happyPromise(i("minDuration","duration.min",/audio|video/,this.mediaDuration,function(a,b){return a>=f.translateScalars(b)}))),m.push(f.happyPromise(i("duration",null,/audio|video/,function(a,b){return f.emptyPromise(b)},function(a){return a}))),m.push(f.happyPromise(i("validateAsyncFn",null,null,function(a,b){return b},function(a){return a===!0||null===a||""===a}))),b.all(m).then(function(){l.resolve(d,d.$ngfValidations)})},f.imageDimensions=function(a){if(a.$ngfWidth&&a.$ngfHeight){var d=b.defer();return c(function(){d.resolve({width:a.$ngfWidth,height:a.$ngfHeight})}),d.promise}if(a.$ngfDimensionPromise)return a.$ngfDimensionPromise;var e=b.defer();return c(function(){return 0!==a.type.indexOf("image")?void e.reject("not image"):void f.dataUrl(a).then(function(b){function d(){var b=h[0].clientWidth,c=h[0].clientHeight;h.remove(),a.$ngfWidth=b,a.$ngfHeight=c,e.resolve({width:b,height:c})}function f(){h.remove(),e.reject("load error")}function g(){c(function(){h[0].parentNode&&(h[0].clientWidth?d():i>10?f():g())},1e3)}var h=angular.element("<img>").attr("src",b).css("visibility","hidden").css("position","fixed");h.on("load",d),h.on("error",f);var i=0;g(),angular.element(document.getElementsByTagName("body")[0]).append(h)},function(){e.reject("load error")})}),a.$ngfDimensionPromise=e.promise,a.$ngfDimensionPromise["finally"](function(){delete a.$ngfDimensionPromise}),a.$ngfDimensionPromise},f.mediaDuration=function(a){if(a.$ngfDuration){var d=b.defer();return c(function(){d.resolve(a.$ngfDuration)}),d.promise}if(a.$ngfDurationPromise)return a.$ngfDurationPromise;var e=b.defer();return c(function(){return 0!==a.type.indexOf("audio")&&0!==a.type.indexOf("video")?void e.reject("not media"):void f.dataUrl(a).then(function(b){function d(){var b=h[0].duration;a.$ngfDuration=b,h.remove(),e.resolve(b)}function f(){h.remove(),e.reject("load error")}function g(){c(function(){h[0].parentNode&&(h[0].duration?d():i>10?f():g())},1e3)}var h=angular.element(0===a.type.indexOf("audio")?"<audio>":"<video>").attr("src",b).css("visibility","none").css("position","fixed");h.on("loadedmetadata",d),h.on("error",f);var i=0;g(),angular.element(document.body).append(h)},function(){e.reject("load error")})}),a.$ngfDurationPromise=e.promise,a.$ngfDurationPromise["finally"](function(){delete a.$ngfDurationPromise}),a.$ngfDurationPromise},f}]),ngFileUpload.service("UploadResize",["UploadValidate","$q",function(a,b){var c=a,d=function(a,b,c,d,e){var f=e?Math.max(c/a,d/b):Math.min(c/a,d/b);return{width:a*f,height:b*f,marginX:a*f-c,marginY:b*f-d}},e=function(a,e,f,g,h,i,j,k){var l=b.defer(),m=document.createElement("canvas"),n=document.createElement("img");return n.onload=function(){if(null!=k&&k(n.width,n.height)===!1)return void l.reject("resizeIf");try{if(i){var a=c.ratioToFloat(i),b=n.width/n.height;a>b?(e=n.width,f=e/a):(f=n.height,e=f*a)}e||(e=n.width),f||(f=n.height);var o=d(n.width,n.height,e,f,j);m.width=Math.min(o.width,e),m.height=Math.min(o.height,f);var p=m.getContext("2d");p.drawImage(n,Math.min(0,-o.marginX/2),Math.min(0,-o.marginY/2),o.width,o.height),l.resolve(m.toDataURL(h||"image/WebP",g||.934))}catch(q){l.reject(q)}},n.onerror=function(){l.reject()},n.src=a,l.promise};return c.dataUrltoBlob=function(a,b,c){for(var d=a.split(","),e=d[0].match(/:(.*?);/)[1],f=atob(d[1]),g=f.length,h=new Uint8Array(g);g--;)h[g]=f.charCodeAt(g);var i=new window.Blob([h],{type:e});return i.name=b,i.$ngfOrigSize=c,i},c.isResizeSupported=function(){var a=document.createElement("canvas");return window.atob&&a.getContext&&a.getContext("2d")&&window.Blob},c.isResizeSupported()&&Object.defineProperty(window.Blob.prototype,"name",{get:function(){return this.$ngfName},set:function(a){this.$ngfName=a},configurable:!0}),c.resize=function(a,d,f,g,h,i,j,k,l){if(0!==a.type.indexOf("image"))return c.emptyPromise(a);var m=b.defer();return c.dataUrl(a,!0).then(function(b){e(b,d,f,g,h||a.type,i,j,k).then(function(d){if("image/jpeg"===a.type&&l)try{d=c.restoreExif(b,d)}catch(e){setTimeout(function(){throw e},1)}m.resolve(c.dataUrltoBlob(d,a.name,a.size))},function(b){"resizeIf"===b&&m.resolve(a),m.reject()})},function(){m.reject()}),m.promise},c}]),function(){function a(a,c,d,e,f,g,h,i,j,k){function l(){return c.attr("disabled")||r("ngfDropDisabled",a)}function m(b,c){i.updateModel(e,d,a,r("ngfChange")||r("ngfDrop"),b,c)}function n(b,c){if(!i.shouldUpdateOn(b,d,a)||!c)return i.rejectPromise([]);var e=[];c.replace(/<(img src|img [^>]* src) *=\"([^\"]*)\"/gi,function(a,b,c){e.push(c)});var f=[],g=[];if(e.length){angular.forEach(e,function(a){f.push(i.urlToBlob(a).then(function(a){g.push(a)}))});var h=k.defer();return k.all(f).then(function(){h.resolve(g)},function(a){h.reject(a)}),h.promise}}function o(a,b,c,d){var e=r("ngfDragOverClass",a,{$event:c}),f="dragover";if(angular.isString(e))f=e;else if(e&&(e.delay&&(v=e.delay),e.accept||e.reject)){var g=c.dataTransfer.items;if(null!=g&&g.length)for(var h=e.pattern||r("ngfPattern",a,{$event:c}),j=g.length;j--;){if(!i.validatePattern(g[j],h)){f=e.reject;break}f=e.accept}else f=e.accept}d(f)}function p(b,c,e,f){function g(a,b){var c=k.defer();if(null!=a)if(a.isDirectory){var d=[i.emptyPromise()];if(m){var e={type:"directory"};e.name=e.path=(b||"")+a.name+a.name,n.push(e)}var f=a.createReader(),h=[],p=function(){f.readEntries(function(e){try{e.length?(h=h.concat(Array.prototype.slice.call(e||[],0)),p()):(angular.forEach(h.slice(0),function(c){n.length<=j&&l>=o&&d.push(g(c,(b?b:"")+a.name+"/"))}),k.all(d).then(function(){c.resolve()},function(a){c.reject(a)}))}catch(f){c.reject(f)}},function(a){c.reject(a)})};p()}else a.file(function(a){try{a.path=(b?b:"")+a.name,m&&(a=i.rename(a,a.path)),n.push(a),o+=a.size,c.resolve()}catch(d){c.reject(d)}},function(a){c.reject(a)});return c.promise}var j=i.getValidationAttr(d,a,"maxFiles")||Number.MAX_VALUE,l=i.getValidationAttr(d,a,"maxTotalSize")||Number.MAX_VALUE,m=r("ngfIncludeDir",a),n=[],o=0,p=[i.emptyPromise()];if(b&&b.length>0&&"file"!==h.protocol())for(var q=0;q<b.length;q++){if(b[q].webkitGetAsEntry&&b[q].webkitGetAsEntry()&&b[q].webkitGetAsEntry().isDirectory){var s=b[q].webkitGetAsEntry();if(s.isDirectory&&!e)continue;null!=s&&p.push(g(s))}else{var t=b[q].getAsFile();null!=t&&(n.push(t),o+=t.size)}if(n.length>j||o>l||!f&&n.length>0)break}else if(null!=c)for(var u=0;u<c.length;u++){var v=c.item(u);if((v.type||v.size>0)&&(n.push(v),o+=v.size),n.length>j||o>l||!f&&n.length>0)break}var w=k.defer();return k.all(p).then(function(){if(f||m)w.resolve(n);else{for(var a=0;n[a]&&"directory"===n[a].type;)a++;w.resolve([n[a]])}},function(a){w.reject(a)}),w.promise}var q=b(),r=function(a,b,c){return i.attrGetter(a,d,b,c)};if(r("dropAvailable")&&g(function(){a[r("dropAvailable")]?a[r("dropAvailable")].value=q:a[r("dropAvailable")]=q}),!q)return void(r("ngfHideOnDropNotAvailable",a)===!0&&c.css("display","none"));null==r("ngfSelect")&&i.registerModelChangeValidator(e,d,a);var s,t=null,u=f(r("ngfStopPropagation")),v=1;c[0].addEventListener("dragover",function(b){if(!l()&&i.shouldUpdateOn("drop",d,a)){if(b.preventDefault(),u(a)&&b.stopPropagation(),navigator.userAgent.indexOf("Chrome")>-1){var e=b.dataTransfer.effectAllowed;b.dataTransfer.dropEffect="move"===e||"linkMove"===e?"move":"copy"}g.cancel(t),s||(s="C",o(a,d,b,function(d){s=d,c.addClass(s),r("ngfDrag",a,{$isDragging:!0,$class:s,$event:b})}))}},!1),c[0].addEventListener("dragenter",function(b){!l()&&i.shouldUpdateOn("drop",d,a)&&(b.preventDefault(),u(a)&&b.stopPropagation())},!1),c[0].addEventListener("dragleave",function(b){!l()&&i.shouldUpdateOn("drop",d,a)&&(b.preventDefault(),u(a)&&b.stopPropagation(),t=g(function(){s&&c.removeClass(s),s=null,r("ngfDrag",a,{$isDragging:!1,$event:b})},v||100))},!1),c[0].addEventListener("drop",function(b){if(!l()&&i.shouldUpdateOn("drop",d,a)){b.preventDefault(),u(a)&&b.stopPropagation(),s&&c.removeClass(s),s=null;var e,f=b.dataTransfer.items;try{e=b.dataTransfer&&b.dataTransfer.getData&&b.dataTransfer.getData("text/html")}catch(g){}p(f,b.dataTransfer.files,r("ngfAllowDir",a)!==!1,r("multiple")||r("ngfMultiple",a)).then(function(a){a.length?m(a,b):n("dropUrl",e).then(function(a){m(a,b)})})}},!1),c[0].addEventListener("paste",function(b){if(navigator.userAgent.toLowerCase().indexOf("firefox")>-1&&r("ngfEnableFirefoxPaste",a)&&b.preventDefault(),!l()&&i.shouldUpdateOn("paste",d,a)){var c=[],e=b.clipboardData||b.originalEvent.clipboardData;if(e&&e.items)for(var f=0;f<e.items.length;f++)-1!==e.items[f].type.indexOf("image")&&c.push(e.items[f].getAsFile());c.length?m(c,b):n("pasteUrl",e).then(function(a){m(a,b)})}},!1),navigator.userAgent.toLowerCase().indexOf("firefox")>-1&&r("ngfEnableFirefoxPaste",a)&&(c.attr("contenteditable",!0),c.on("keypress",function(a){a.metaKey||a.ctrlKey||a.preventDefault()}))}function b(){var a=document.createElement("div");return"draggable"in a&&"ondrop"in a&&!/Edge\/12./i.test(navigator.userAgent)}ngFileUpload.directive("ngfDrop",["$parse","$timeout","$location","Upload","$http","$q",function(b,c,d,e,f,g){return{restrict:"AEC",require:"?ngModel",link:function(h,i,j,k){a(h,i,j,k,b,c,d,e,f,g)}}}]),ngFileUpload.directive("ngfNoFileDrop",function(){return function(a,c){b()&&c.css("display","none")}}),ngFileUpload.directive("ngfDropAvailable",["$parse","$timeout","Upload",function(a,c,d){
+return function(e,f,g){if(b()){var h=a(d.attrGetter("ngfDropAvailable",g));c(function(){h(e),h.assign&&h.assign(e,!0)})}}}])}(),ngFileUpload.service("UploadExif",["UploadResize","$q",function(a,b){function c(a,b,c,d){switch(b){case 2:return a.transform(-1,0,0,1,c,0);case 3:return a.transform(-1,0,0,-1,c,d);case 4:return a.transform(1,0,0,-1,0,d);case 5:return a.transform(0,1,1,0,0,0);case 6:return a.transform(0,1,-1,0,d,0);case 7:return a.transform(0,-1,-1,0,d,c);case 8:return a.transform(0,-1,1,0,0,c)}}function d(a){for(var b="",c=new Uint8Array(a),d=c.byteLength,e=0;d>e;e++)b+=String.fromCharCode(c[e]);return window.btoa(b)}var e=a;return e.isExifSupported=function(){return window.FileReader&&(new FileReader).readAsArrayBuffer&&e.isResizeSupported()},e.readOrientation=function(a){var c=b.defer(),d=new FileReader,e=a.slice(0,65536);return d.readAsArrayBuffer(e),d.onerror=function(a){return c.reject(a)},d.onload=function(a){var b={orientation:1},d=new DataView(this.result);if(65496!==d.getUint16(0,!1))return c.resolve(b);for(var e=d.byteLength,f=2;e>f;){var g=d.getUint16(f,!1);if(f+=2,65505===g){if(1165519206!==d.getUint32(f+=2,!1))return c.resolve(b);var h=18761===d.getUint16(f+=6,!1);f+=d.getUint32(f+4,h);var i=d.getUint16(f,h);f+=2;for(var j=0;i>j;j++)if(274===d.getUint16(f+12*j,h)){var k=d.getUint16(f+12*j+8,h);return k>=2&&8>=k&&(d.setUint16(f+12*j+8,1,h),b.fixedArrayBuffer=a.target.result),b.orientation=k,c.resolve(b)}}else{if(65280!==(65280&g))break;f+=d.getUint16(f,!1)}}return c.resolve(b)},c.promise},e.applyExifRotation=function(a){if(0!==a.type.indexOf("image/jpeg"))return e.emptyPromise(a);var f=b.defer();return e.readOrientation(a).then(function(b){return b.orientation<2||b.orientation>8?f.resolve(a):void e.dataUrl(a,!0).then(function(g){var h=document.createElement("canvas"),i=document.createElement("img");i.onload=function(){try{h.width=b.orientation>4?i.height:i.width,h.height=b.orientation>4?i.width:i.height;var g=h.getContext("2d");c(g,b.orientation,i.width,i.height),g.drawImage(i,0,0);var j=h.toDataURL(a.type||"image/WebP",.934);j=e.restoreExif(d(b.fixedArrayBuffer),j);var k=e.dataUrltoBlob(j,a.name);f.resolve(k)}catch(l){return f.reject(l)}},i.onerror=function(){f.reject()},i.src=g},function(a){f.reject(a)})},function(a){f.reject(a)}),f.promise},e.restoreExif=function(a,b){var c={};return c.KEY_STR="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",c.encode64=function(a){var b,c,d,e,f,g="",h="",i="",j=0;do b=a[j++],c=a[j++],h=a[j++],d=b>>2,e=(3&b)<<4|c>>4,f=(15&c)<<2|h>>6,i=63&h,isNaN(c)?f=i=64:isNaN(h)&&(i=64),g=g+this.KEY_STR.charAt(d)+this.KEY_STR.charAt(e)+this.KEY_STR.charAt(f)+this.KEY_STR.charAt(i),b=c=h="",d=e=f=i="";while(j<a.length);return g},c.restore=function(a,b){a.match("data:image/jpeg;base64,")&&(a=a.replace("data:image/jpeg;base64,",""));var c=this.decode64(a),d=this.slice2Segments(c),e=this.exifManipulation(b,d);return"data:image/jpeg;base64,"+this.encode64(e)},c.exifManipulation=function(a,b){var c=this.getExifArray(b),d=this.insertExif(a,c);return new Uint8Array(d)},c.getExifArray=function(a){for(var b,c=0;c<a.length;c++)if(b=a[c],255===b[0]&225===b[1])return b;return[]},c.insertExif=function(a,b){var c=a.replace("data:image/jpeg;base64,",""),d=this.decode64(c),e=d.indexOf(255,3),f=d.slice(0,e),g=d.slice(e),h=f;return h=h.concat(b),h=h.concat(g)},c.slice2Segments=function(a){for(var b=0,c=[];;){if(255===a[b]&218===a[b+1])break;if(255===a[b]&216===a[b+1])b+=2;else{var d=256*a[b+2]+a[b+3],e=b+d+2,f=a.slice(b,e);c.push(f),b=e}if(b>a.length)break}return c},c.decode64=function(a){var b,c,d,e,f,g="",h="",i=0,j=[],k=/[^A-Za-z0-9\+\/\=]/g;k.exec(a)&&console.log("There were invalid base64 characters in the input text.\nValid base64 characters are A-Z, a-z, 0-9, NaNExpect errors in decoding."),a=a.replace(/[^A-Za-z0-9\+\/\=]/g,"");do d=this.KEY_STR.indexOf(a.charAt(i++)),e=this.KEY_STR.indexOf(a.charAt(i++)),f=this.KEY_STR.indexOf(a.charAt(i++)),h=this.KEY_STR.indexOf(a.charAt(i++)),b=d<<2|e>>4,c=(15&e)<<4|f>>2,g=(3&f)<<6|h,j.push(b),64!==f&&j.push(c),64!==h&&j.push(g),b=c=g="",d=e=f=h="";while(i<a.length);return j},c.restore(a,b)},e}]);
\ No newline at end of file
diff --git a/dist/FileAPI.min.js b/dist/FileAPI.min.js
index dc63b215..6988d96f 100644
--- a/dist/FileAPI.min.js
+++ b/dist/FileAPI.min.js
@@ -1,4 +1,4 @@
-/*! 11.2.3 */
+/*! 12.0.0 */
 /*! FileAPI 2.0.7 - BSD | git://github.com/mailru/FileAPI.git
  * FileAPI — a set of  javascript tools for working with files. Multiupload, drag'n'drop and chunked file upload. Images: crop, resize and auto orientation by EXIF.
  */
diff --git a/dist/ng-file-upload-all.js b/dist/ng-file-upload-all.js
index d2f7f60b..54f55c6a 100644
--- a/dist/ng-file-upload-all.js
+++ b/dist/ng-file-upload-all.js
@@ -3,7 +3,7 @@
  * progress, resize, thumbnail, preview, validation and CORS
  * FileAPI Flash shim for old browsers not supporting FormData
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 (function () {
@@ -424,7 +424,7 @@ if (!window.FileReader) {
  * AngularJS file upload directives and services. Supoorts: file upload/drop/paste, resume, cancel/abort,
  * progress, resize, thumbnail, preview, validation and CORS
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
@@ -445,7 +445,7 @@ if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
 
 var ngFileUpload = angular.module('ngFileUpload', []);
 
-ngFileUpload.version = '11.2.3';
+ngFileUpload.version = '12.0.0';
 
 ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http, $q, $timeout) {
   var upload = this;
@@ -491,7 +491,7 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
     if (!config.disableProgress) {
       config.headers.__setXHR_ = function () {
         return function (xhr) {
-          if (!xhr) return;
+          if (!xhr || !xhr.upload || !xhr.upload.addEventListener) return;
           config.__XHR = xhr;
           if (config.xhrFn) config.xhrFn(xhr);
           xhr.upload.addEventListener('progress', function (e) {
@@ -769,11 +769,11 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
   this.translateScalars = function (str) {
     if (angular.isString(str)) {
       if (str.search(/kb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000);
+        return parseFloat(str.substring(0, str.length - 2) * 1024);
       } else if (str.search(/mb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1048576);
       } else if (str.search(/gb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1073741824);
       } else if (str.search(/b/i) === str.length - 1) {
         return parseFloat(str.substring(0, str.length - 1));
       } else if (str.search(/s/i) === str.length - 1) {
@@ -897,7 +897,8 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
     var param = upload.attrGetter('ngfResize', attr, scope);
     if (!param || !angular.isObject(param) || !upload.isResizeSupported() || !files.length) return upload.emptyPromise();
     var promises = [upload.emptyPromise()];
-    angular.forEach(files, function (f, i) {
+
+    function handleFile(f, i) {
       if (f.type.indexOf('image') === 0) {
         if (param.pattern && !upload.validatePattern(f, param.pattern)) return;
         var promise = upload.resize(f, param.width, param.height, param.quality,
@@ -913,43 +914,20 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           f.$errorParam = (e ? (e.message ? e.message : e) + ': ' : '') + (f && f.name);
         });
       }
-    });
-    return $q.all(promises);
-  }
+    }
 
-  function handleKeep(files, prevFiles, attr, scope) {
-    var dupFiles = [];
-    var keep = upload.attrGetter('ngfKeep', attr, scope);
-    if (keep) {
-      var hasNew = false;
-
-      if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
-        var len = prevFiles.length;
-        if (files) {
-          for (var i = 0; i < files.length; i++) {
-            for (var j = 0; j < len; j++) {
-              if (files[i].name === prevFiles[j].name) {
-                dupFiles.push(files[i]);
-                break;
-              }
-            }
-            if (j === len) {
-              prevFiles.push(files[i]);
-              hasNew = true;
-            }
-          }
-        }
-        files = prevFiles;
-      } else {
-        files = prevFiles.concat(files || []);
-      }
+    for (var i = 0; i < files.length; i++) {
+      handleFile(files[i], i);
     }
-    return {files: files, dupFiles: dupFiles, keep: keep};
+    return $q.all(promises);
   }
 
   upload.updateModel = function (ngModel, attr, scope, fileChange, files, evt, noDelay) {
     function update(files, invalidFiles, newFiles, dupFiles, isSingleModel) {
+      attr.$$ngfPrevValidFiles = files;
+      attr.$$ngfPrevInvalidFiles = invalidFiles;
       var file = files && files.length ? files[0] : null;
+      var invalidFile = invalidFiles && invalidFiles.length ? invalidFiles[0] : null;
 
       if (ngModel) {
         upload.applyModelValidation(ngModel, files);
@@ -963,6 +941,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           $newFiles: newFiles,
           $duplicateFiles: dupFiles,
           $invalidFiles: invalidFiles,
+          $invalidFile: invalidFile,
           $event: evt
         });
       }
@@ -970,7 +949,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       var invalidModel = upload.attrGetter('ngfModelInvalid', attr);
       if (invalidModel) {
         $timeout(function () {
-          $parse(invalidModel).assign(scope, invalidFiles);
+          $parse(invalidModel).assign(scope, isSingleModel ? invalidFile : invalidFiles);
         });
       }
       $timeout(function () {
@@ -978,83 +957,128 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       });
     }
 
-    var newFiles = files;
-    var prevFiles = ngModel && ngModel.$modelValue && (angular.isArray(ngModel.$modelValue) ?
-        ngModel.$modelValue : [ngModel.$modelValue]);
-    prevFiles = (prevFiles || attr.$$ngfPrevFiles || []).slice(0);
-    var keepResult = handleKeep(files, prevFiles, attr, scope);
-    files = keepResult.files;
-    var dupFiles = keepResult.dupFiles;
-    var isSingleModel = !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr) && !keepResult.keep;
+    var allNewFiles, dupFiles = [], prevValidFiles, prevInvalidFiles,
+      invalids = [], valids = [];
 
-    attr.$$ngfPrevFiles = files;
+    function removeDuplicates() {
+      function equals(f1, f2) {
+        return f1.name === f2.name && (f1.$ngfOrigSize || f1.size) === (f2.$ngfOrigSize || f2.size) &&
+          f1.type === f2.type;
+      }
 
-    if (keepResult.keep && (!newFiles || !newFiles.length)) return;
+      function isInPrevFiles(f) {
+        var j;
+        for (j = 0; j < prevValidFiles.length; j++) {
+          if (equals(f, prevValidFiles[j])) {
+            return true;
+          }
+        }
+        for (j = 0; j < prevInvalidFiles.length; j++) {
+          if (equals(f, prevInvalidFiles[j])) {
+            return true;
+          }
+        }
+        return false;
+      }
 
-    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
-      $files: files,
-      $file: files && files.length ? files[0] : null,
-      $duplicateFiles: dupFiles,
-      $event: evt
-    });
+      if (files) {
+        allNewFiles = [];
+        dupFiles = [];
+        for (var i = 0; i < files.length; i++) {
+          if (isInPrevFiles(files[i])) {
+            dupFiles.push(files[i]);
+          } else {
+            allNewFiles.push(files[i]);
+          }
+        }
+      }
+    }
+
+    function toArray(v) {
+      return angular.isArray(v) ? v : [v];
+    }
 
-    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
-    var invalids = [];
     function separateInvalids() {
-      var valids = [];
-      angular.forEach(files, function (file) {
+      valids = [];
+      invalids = [];
+      angular.forEach(allNewFiles, function (file) {
         if (file.$error) {
           invalids.push(file);
         } else {
           valids.push(file);
         }
       });
-      files = valids;
     }
 
-    upload.validate(newFiles, ngModel, attr, scope).then(function () {
+    function resizeAndUpdate() {
+      function updateModel() {
+        $timeout(function () {
+          update(keep ? prevValidFiles.concat(valids) : valids,
+            keep ? prevInvalidFiles.concat(invalids) : invalids,
+            files, dupFiles, isSingleModel);
+        }, options && options.debounce ? options.debounce.change || options.debounce : 0);
+      }
+
+      resize(validateAfterResize ? allNewFiles : valids, attr, scope).then(function () {
+        if (validateAfterResize) {
+          upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
+            separateInvalids();
+            updateModel();
+          });
+        } else {
+          updateModel();
+        }
+      }, function (e) {
+        throw 'Could not resize files ' + e;
+      });
+    }
+
+    prevValidFiles = attr.$$ngfPrevValidFiles || [];
+    prevInvalidFiles = attr.$$ngfPrevInvalidFiles || [];
+    if (ngModel && ngModel.$modelValue) {
+      prevValidFiles = toArray(ngModel.$modelValue);
+    }
+
+    var keep = upload.attrGetter('ngfKeep', attr, scope);
+    allNewFiles = (files || []).slice(0);
+    if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
+      removeDuplicates(attr, scope);
+    }
+
+    var isSingleModel = !keep && !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr);
+
+    if (keep && !allNewFiles.length) return;
+
+    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
+      $files: files,
+      $file: files && files.length ? files[0] : null,
+      $newFiles: allNewFiles,
+      $duplicateFiles: dupFiles,
+      $event: evt
+    });
+
+    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
+
+    var allLength = allNewFiles.length + prevValidFiles.length + prevInvalidFiles.length;
+    var options = upload.attrGetter('ngModelOptions', attr, scope);
+    upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
       if (noDelay) {
-        update(files, [], newFiles, dupFiles, isSingleModel);
+        update(allNewFiles, [], files, dupFiles, isSingleModel);
       } else {
-        var options = upload.attrGetter('ngModelOptions', attr, scope);
         if ((!options || !options.allowInvalid) && !validateAfterResize) {
           separateInvalids();
+        } else {
+          valids = allNewFiles;
         }
-        var fixOrientation = upload.emptyPromise(files);
         if (upload.attrGetter('ngfFixOrientation', attr, scope) && upload.isExifSupported()) {
-          fixOrientation = applyExifRotations(files, attr, scope);
-        }
-        fixOrientation.then(function () {
-          function updateModel() {
-            $timeout(function () {
-              update(files, invalids, newFiles, dupFiles, isSingleModel);
-            }, options && options.debounce ? options.debounce.change || options.debounce : 0);
-          }
-          resize(files, attr, scope).then(function () {
-            if (validateAfterResize) {
-              upload.validate(files, ngModel, attr, scope).then(function () {
-                separateInvalids();
-                updateModel();
-              });
-            } else {
-              updateModel();
-            }
-          }, function (e) {
-            throw 'Could not resize files ' + e;
+          applyExifRotations(valids, attr, scope).then(function () {
+            resizeAndUpdate();
           });
-        });
+        } else {
+          resizeAndUpdate();
+        }
       }
     });
-
-    // cleaning object url memories
-    var l = prevFiles.length;
-    while (l--) {
-      var prevFile = prevFiles[l];
-      if (window.URL && prevFile.blobUrl) {
-        URL.revokeObjectURL(prevFile.blobUrl);
-        delete prevFile.blobUrl;
-      }
-    }
   };
 
   return upload;
@@ -1347,7 +1371,20 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
             }
             $timeout(function () {
               file.$ngfBlobUrl = url;
-              if (url) deferred.resolve(url, file);
+              if (url) {
+                deferred.resolve(url, file);
+                upload.blobUrls = upload.blobUrls || [];
+                upload.blobUrlsTotalSize = upload.blobUrlsTotalSize || 0;
+                upload.blobUrls.push({url: url, size: file.size});
+                upload.blobUrlsTotalSize += file.size || 0;
+                var maxMemory = upload.defaults.blobUrlsMaxMemory || 268435456;
+                var maxLength = upload.defaults.blobUrlsMaxQueueSize || 200;
+                while ((upload.blobUrlsTotalSize > maxMemory || upload.blobUrls.length > maxLength) && upload.blobUrls.length > 1) {
+                  var obj = upload.blobUrls.splice(0, 1)[0];
+                  URL.revokeObjectURL(obj.url);
+                  upload.blobUrlsTotalSize -= obj.size;
+                }
+              }
             });
           } else {
             var fileReader = new FileReader();
@@ -1355,6 +1392,9 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
               $timeout(function () {
                 file.$ngfDataUrl = e.target.result;
                 deferred.resolve(e.target.result, file);
+                $timeout(function () {
+                  delete file.$ngfDataUrl;
+                }, 1000);
               });
             };
             fileReader.onerror = function () {
@@ -1367,7 +1407,7 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
           }
         } else {
           $timeout(function () {
-            file[disallowObjectUrl ? 'dataUrl' : 'blobUrl'] = '';
+            file[disallowObjectUrl ? '$ngfDataUrl' : '$ngfBlobUrl'] = '';
             deferred.reject();
           });
         }
@@ -1598,7 +1638,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           if (files && !angular.isArray(files)) {
             files = [files];
           }
-          upload.validate(files, ngModel, attr, scope).then(function () {
+          upload.validate(files, files ? files.length : 0, ngModel, attr, scope).then(function () {
             upload.applyModelValidation(ngModel, files);
           });
         }
@@ -1639,7 +1679,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
     return val;
   };
 
-  upload.validate = function (files, ngModel, attr, scope) {
+  upload.validate = function (files, allLength, ngModel, attr, scope) {
     ngModel = ngModel || {};
     ngModel.$ngfValidations = ngModel.$ngfValidations || [];
 
@@ -1667,6 +1707,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
             if (val != null) {
               if (!fn(file, val)) {
                 file.$error = name;
+                (file.$errorMessages = (file.$errorMessages || {})).name = true;
                 file.$errorParam = val;
                 files.splice(i, 1);
                 valid = false;
@@ -1680,16 +1721,15 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
       }
     }
 
-    var filesLength = files.length;
     validateSync('maxFiles', null, function (file, val) {
-      return filesLength <= val;
+      return allLength <= val;
     });
     validateSync('pattern', null, upload.validatePattern);
     validateSync('minSize', 'size.min', function (file, val) {
-      return file.size >= upload.translateScalars(val);
+      return file.size + 0.1 >= upload.translateScalars(val);
     });
     validateSync('maxSize', 'size.max', function (file, val) {
-      return file.size <= upload.translateScalars(val);
+      return file.size - 0.1 <= upload.translateScalars(val);
     });
     var totalSize = 0;
     validateSync('maxTotalSize', null, function (file, val) {
@@ -1715,6 +1755,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           asyncFn(file, val).then(function (d) {
             if (!fn(d, val)) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -1723,6 +1764,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           }, function () {
             if (attrGetter('ngfValidateForce', {$file: file})) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -2046,7 +2088,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     return deferred.promise;
   };
 
-  upload.dataUrltoBlob = function (dataurl, name) {
+  upload.dataUrltoBlob = function (dataurl, name, origSize) {
     var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
       bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
     while (n--) {
@@ -2054,6 +2096,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     }
     var blob = new window.Blob([u8arr], {type: mime});
     blob.name = name;
+    blob.$ngfOrigSize = origSize;
     return blob;
   };
 
@@ -2089,7 +2132,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               setTimeout(function () {throw e;}, 1);
             }
           }
-          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name));
+          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name, file.size));
         }, function (r) {
           if (r === 'resizeIf') {
             deferred.resolve(file);
@@ -2213,12 +2256,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       if (stopPropagation(scope)) evt.stopPropagation();
       if (actualDragOverClass) elem.removeClass(actualDragOverClass);
       actualDragOverClass = null;
-      extractFiles(evt, attrGetter('ngfAllowDir', scope) !== false,
+      var items = evt.dataTransfer.items;
+      var html;
+      try {
+        html = evt.dataTransfer && evt.dataTransfer.getData && evt.dataTransfer.getData('text/html');
+      } catch (e) {/* Fix IE11 that throw error calling getData */
+      }
+
+      extractFiles(items, evt.dataTransfer.files, attrGetter('ngfAllowDir', scope) !== false,
         attrGetter('multiple') || attrGetter('ngfMultiple', scope)).then(function (files) {
         if (files.length) {
           updateModel(files, evt);
         } else {
-          extractFilesFromHtml('dropUrl', evt.dataTransfer).then(function (files) {
+          extractFilesFromHtml('dropUrl', html).then(function (files) {
             updateModel(files, evt);
           });
         }
@@ -2262,12 +2312,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       upload.updateModel(ngModel, attr, scope, attrGetter('ngfChange') || attrGetter('ngfDrop'), files, evt);
     }
 
-    function extractFilesFromHtml(updateOn, obj) {
-      var html;
-      try {
-        html = (obj && obj.getData && obj.getData('text/html'));
-      } catch (e) {/* Fix IE11 that throw error calling getData */
-      }
+    function extractFilesFromHtml(updateOn, html) {
       if (!upload.shouldUpdateOn(updateOn, attr, scope) || !html) return upload.rejectPromise([]);
       var urls = [];
       html.replace(/<(img src|img [^>]* src) *=\"([^\"]*)\"/gi, function (m, n, src) {
@@ -2317,18 +2362,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       callback(dClass);
     }
 
-    function extractFiles(evt, allowDir, multiple) {
+    function extractFiles(items, fileList, allowDir, multiple) {
       var maxFiles = upload.getValidationAttr(attr, scope, 'maxFiles') || Number.MAX_VALUE;
       var maxTotalSize = upload.getValidationAttr(attr, scope, 'maxTotalSize') || Number.MAX_VALUE;
       var includeDir = attrGetter('ngfIncludeDir', scope);
       var files = [], totalSize = 0;
+
       function traverseFileTree(entry, path) {
         var defer = $q.defer();
         if (entry != null) {
           if (entry.isDirectory) {
             var promises = [upload.emptyPromise()];
             if (includeDir) {
-              var file = {type : 'directory'};
+              var file = {type: 'directory'};
               file.name = file.path = (path || '') + entry.name + entry.name;
               files.push(file);
             }
@@ -2338,7 +2384,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               dirReader.readEntries(function (results) {
                 try {
                   if (!results.length) {
-                    angular.forEach(entries.slice(0), function(e) {
+                    angular.forEach(entries.slice(0), function (e) {
                       if (files.length <= maxFiles && totalSize <= maxTotalSize) {
                         promises.push(traverseFileTree(e, (path ? path : '') + entry.name + '/'));
                       }
@@ -2383,7 +2429,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var promises = [upload.emptyPromise()];
 
-      var items = evt.dataTransfer.items;
       if (items && items.length > 0 && $location.protocol() !== 'file') {
         for (var i = 0; i < items.length; i++) {
           if (items[i].webkitGetAsEntry && items[i].webkitGetAsEntry() && items[i].webkitGetAsEntry().isDirectory) {
@@ -2405,7 +2450,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
             (!multiple && files.length > 0)) break;
         }
       } else {
-        var fileList = evt.dataTransfer.files;
         if (fileList != null) {
           for (var j = 0; j < fileList.length; j++) {
             var file = fileList.item(j);
@@ -2421,12 +2465,12 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var defer = $q.defer();
       $q.all(promises).then(function () {
-        if (!multiple) {
+        if (!multiple && !includeDir) {
           var i = 0;
-          while (files.length && files[i].type === 'directory') i++;
+          while (files[i] && files[i].type === 'directory') i++;
           defer.resolve([files[i]]);
         } else {
-            defer.resolve(files);
+          defer.resolve(files);
         }
       }, function (e) {
         defer.reject(e);
diff --git a/dist/ng-file-upload-all.min.js b/dist/ng-file-upload-all.min.js
index 159ca7c9..c3834467 100644
--- a/dist/ng-file-upload-all.min.js
+++ b/dist/ng-file-upload-all.min.js
@@ -1,4 +1,4 @@
-/*! 11.2.3 */
-!function(){function a(a,b){window.XMLHttpRequest.prototype[a]=b(window.XMLHttpRequest.prototype[a])}function b(a,b,c){try{Object.defineProperty(a,b,{get:c})}catch(d){}}if(window.FileAPI||(window.FileAPI={}),!window.XMLHttpRequest)throw"AJAX is not supported. XMLHttpRequest is not defined.";if(FileAPI.shouldLoad=!window.FormData||FileAPI.forceLoad,FileAPI.shouldLoad){var c=function(a){if(!a.__listeners){a.upload||(a.upload={}),a.__listeners=[];var b=a.upload.addEventListener;a.upload.addEventListener=function(c,d){a.__listeners[c]=d,b&&b.apply(this,arguments)}}};a("open",function(a){return function(b,d,e){c(this),this.__url=d;try{a.apply(this,[b,d,e])}catch(f){f.message.indexOf("Access is denied")>-1&&(this.__origError=f,a.apply(this,[b,"_fix_for_ie_crossdomain__",e]))}}}),a("getResponseHeader",function(a){return function(b){return this.__fileApiXHR&&this.__fileApiXHR.getResponseHeader?this.__fileApiXHR.getResponseHeader(b):null==a?null:a.apply(this,[b])}}),a("getAllResponseHeaders",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.getAllResponseHeaders?this.__fileApiXHR.getAllResponseHeaders():null==a?null:a.apply(this)}}),a("abort",function(a){return function(){return this.__fileApiXHR&&this.__fileApiXHR.abort?this.__fileApiXHR.abort():null==a?null:a.apply(this)}}),a("setRequestHeader",function(a){return function(b,d){if("__setXHR_"===b){c(this);var e=d(this);e instanceof Function&&e(this)}else this.__requestHeaders=this.__requestHeaders||{},this.__requestHeaders[b]=d,a.apply(this,arguments)}}),a("send",function(a){return function(){var c=this;if(arguments[0]&&arguments[0].__isFileAPIShim){var d=arguments[0],e={url:c.__url,jsonp:!1,cache:!0,complete:function(a,d){a&&angular.isString(a)&&-1!==a.indexOf("#2174")&&(a=null),c.__completed=!0,!a&&c.__listeners.load&&c.__listeners.load({type:"load",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),!a&&c.__listeners.loadend&&c.__listeners.loadend({type:"loadend",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),"abort"===a&&c.__listeners.abort&&c.__listeners.abort({type:"abort",loaded:c.__loaded,total:c.__total,target:c,lengthComputable:!0}),void 0!==d.status&&b(c,"status",function(){return 0===d.status&&a&&"abort"!==a?500:d.status}),void 0!==d.statusText&&b(c,"statusText",function(){return d.statusText}),b(c,"readyState",function(){return 4}),void 0!==d.response&&b(c,"response",function(){return d.response});var e=d.responseText||(a&&0===d.status&&"abort"!==a?a:void 0);b(c,"responseText",function(){return e}),b(c,"response",function(){return e}),a&&b(c,"err",function(){return a}),c.__fileApiXHR=d,c.onreadystatechange&&c.onreadystatechange(),c.onload&&c.onload()},progress:function(a){if(a.target=c,c.__listeners.progress&&c.__listeners.progress(a),c.__total=a.total,c.__loaded=a.loaded,a.total===a.loaded){var b=this;setTimeout(function(){c.__completed||(c.getAllResponseHeaders=function(){},b.complete(null,{status:204,statusText:"No Content"}))},FileAPI.noContentTimeout||1e4)}},headers:c.__requestHeaders};e.data={},e.files={};for(var f=0;f<d.data.length;f++){var g=d.data[f];null!=g.val&&null!=g.val.name&&null!=g.val.size&&null!=g.val.type?e.files[g.key]=g.val:e.data[g.key]=g.val}setTimeout(function(){if(!FileAPI.hasFlash)throw'Adode Flash Player need to be installed. 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diff --git a/dist/ng-file-upload-shim.js b/dist/ng-file-upload-shim.js
index a7bf0027..1fccd6bc 100644
--- a/dist/ng-file-upload-shim.js
+++ b/dist/ng-file-upload-shim.js
@@ -3,7 +3,7 @@
  * progress, resize, thumbnail, preview, validation and CORS
  * FileAPI Flash shim for old browsers not supporting FormData
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 (function () {
diff --git a/dist/ng-file-upload-shim.min.js b/dist/ng-file-upload-shim.min.js
index 644492a7..34cb5be5 100644
--- a/dist/ng-file-upload-shim.min.js
+++ b/dist/ng-file-upload-shim.min.js
@@ -1,2 +1,2 @@
-/*! 11.2.3 */
+/*! 12.0.0 */
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To check ahead use "FileAPI.hasFlash"';var g=function(){var b=e.parent();d.attr("disabled")?b&&b.removeClass("js-fileapi-wrapper"):(e.attr("__ngf_flash_")||(e.unbind("change"),e.unbind("click"),e.bind("change",function(a){h.apply(this,[a]),f.apply(this,[a])}),e.attr("__ngf_flash_","true")),b.addClass("js-fileapi-wrapper"),a(d)||(b.css("position","absolute").css("top",c(d[0]).top+"px").css("left",c(d[0]).left+"px").css("width",d[0].offsetWidth+"px").css("height",d[0].offsetHeight+"px").css("filter","alpha(opacity=0)").css("display",d.css("display")).css("overflow","hidden").css("z-index","900000").css("visibility","visible"),e.css("width",d[0].offsetWidth+"px").css("height",d[0].offsetHeight+"px").css("position","absolute").css("top","0px").css("left","0px")))};d.bind("mouseenter",g);var h=function(a){for(var b=FileAPI.getFiles(a),c=0;c<b.length;c++)void 0===b[c].size&&(b[c].size=0),void 0===b[c].name&&(b[c].name="file"),void 0===b[c].type&&(b[c].type="undefined");a.target||(a.target={}),a.target.files=b,a.target.files!==b&&(a.__files_=b),(a.__files_||a.target.files).item=function(b){return(a.__files_||a.target.files)[b]||null}}},FileAPI.disableFileInput=function(a,b){b?a.removeClass("js-fileapi-wrapper"):a.addClass("js-fileapi-wrapper")}}}(),window.FileReader||(window.FileReader=function(){var a=this,b=!1;this.listeners={},this.addEventListener=function(b,c){a.listeners[b]=a.listeners[b]||[],a.listeners[b].push(c)},this.removeEventListener=function(b,c){a.listeners[b]&&a.listeners[b].splice(a.listeners[b].indexOf(c),1)},this.dispatchEvent=function(b){var c=a.listeners[b.type];if(c)for(var d=0;d<c.length;d++)c[d].call(a,b)},this.onabort=this.onerror=this.onload=this.onloadstart=this.onloadend=this.onprogress=null;var c=function(b,c){var d={type:b,target:a,loaded:c.loaded,total:c.total,error:c.error};return null!=c.result&&(d.target.result=c.result),d},d=function(d){b||(b=!0,a.onloadstart&&a.onloadstart(c("loadstart",d)));var e;"load"===d.type?(a.onloadend&&a.onloadend(c("loadend",d)),e=c("load",d),a.onload&&a.onload(e),a.dispatchEvent(e)):"progress"===d.type?(e=c("progress",d),a.onprogress&&a.onprogress(e),a.dispatchEvent(e)):(e=c("error",d),a.onerror&&a.onerror(e),a.dispatchEvent(e))};this.readAsDataURL=function(a){FileAPI.readAsDataURL(a,d)},this.readAsText=function(a){FileAPI.readAsText(a,d)}});
\ No newline at end of file
diff --git a/dist/ng-file-upload.js b/dist/ng-file-upload.js
index 3ea03501..b3d6ed9e 100644
--- a/dist/ng-file-upload.js
+++ b/dist/ng-file-upload.js
@@ -2,7 +2,7 @@
  * AngularJS file upload directives and services. Supoorts: file upload/drop/paste, resume, cancel/abort,
  * progress, resize, thumbnail, preview, validation and CORS
  * @author  Danial  <danial.farid@gmail.com>
- * @version 11.2.3
+ * @version 12.0.0
  */
 
 if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
@@ -23,7 +23,7 @@ if (window.XMLHttpRequest && !(window.FileAPI && FileAPI.shouldLoad)) {
 
 var ngFileUpload = angular.module('ngFileUpload', []);
 
-ngFileUpload.version = '11.2.3';
+ngFileUpload.version = '12.0.0';
 
 ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http, $q, $timeout) {
   var upload = this;
@@ -69,7 +69,7 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
     if (!config.disableProgress) {
       config.headers.__setXHR_ = function () {
         return function (xhr) {
-          if (!xhr) return;
+          if (!xhr || !xhr.upload || !xhr.upload.addEventListener) return;
           config.__XHR = xhr;
           if (config.xhrFn) config.xhrFn(xhr);
           xhr.upload.addEventListener('progress', function (e) {
@@ -347,11 +347,11 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
   this.translateScalars = function (str) {
     if (angular.isString(str)) {
       if (str.search(/kb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000);
+        return parseFloat(str.substring(0, str.length - 2) * 1024);
       } else if (str.search(/mb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1048576);
       } else if (str.search(/gb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1073741824);
       } else if (str.search(/b/i) === str.length - 1) {
         return parseFloat(str.substring(0, str.length - 1));
       } else if (str.search(/s/i) === str.length - 1) {
@@ -475,7 +475,8 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
     var param = upload.attrGetter('ngfResize', attr, scope);
     if (!param || !angular.isObject(param) || !upload.isResizeSupported() || !files.length) return upload.emptyPromise();
     var promises = [upload.emptyPromise()];
-    angular.forEach(files, function (f, i) {
+
+    function handleFile(f, i) {
       if (f.type.indexOf('image') === 0) {
         if (param.pattern && !upload.validatePattern(f, param.pattern)) return;
         var promise = upload.resize(f, param.width, param.height, param.quality,
@@ -491,43 +492,20 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           f.$errorParam = (e ? (e.message ? e.message : e) + ': ' : '') + (f && f.name);
         });
       }
-    });
-    return $q.all(promises);
-  }
+    }
 
-  function handleKeep(files, prevFiles, attr, scope) {
-    var dupFiles = [];
-    var keep = upload.attrGetter('ngfKeep', attr, scope);
-    if (keep) {
-      var hasNew = false;
-
-      if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
-        var len = prevFiles.length;
-        if (files) {
-          for (var i = 0; i < files.length; i++) {
-            for (var j = 0; j < len; j++) {
-              if (files[i].name === prevFiles[j].name) {
-                dupFiles.push(files[i]);
-                break;
-              }
-            }
-            if (j === len) {
-              prevFiles.push(files[i]);
-              hasNew = true;
-            }
-          }
-        }
-        files = prevFiles;
-      } else {
-        files = prevFiles.concat(files || []);
-      }
+    for (var i = 0; i < files.length; i++) {
+      handleFile(files[i], i);
     }
-    return {files: files, dupFiles: dupFiles, keep: keep};
+    return $q.all(promises);
   }
 
   upload.updateModel = function (ngModel, attr, scope, fileChange, files, evt, noDelay) {
     function update(files, invalidFiles, newFiles, dupFiles, isSingleModel) {
+      attr.$$ngfPrevValidFiles = files;
+      attr.$$ngfPrevInvalidFiles = invalidFiles;
       var file = files && files.length ? files[0] : null;
+      var invalidFile = invalidFiles && invalidFiles.length ? invalidFiles[0] : null;
 
       if (ngModel) {
         upload.applyModelValidation(ngModel, files);
@@ -541,6 +519,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           $newFiles: newFiles,
           $duplicateFiles: dupFiles,
           $invalidFiles: invalidFiles,
+          $invalidFile: invalidFile,
           $event: evt
         });
       }
@@ -548,7 +527,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       var invalidModel = upload.attrGetter('ngfModelInvalid', attr);
       if (invalidModel) {
         $timeout(function () {
-          $parse(invalidModel).assign(scope, invalidFiles);
+          $parse(invalidModel).assign(scope, isSingleModel ? invalidFile : invalidFiles);
         });
       }
       $timeout(function () {
@@ -556,83 +535,128 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       });
     }
 
-    var newFiles = files;
-    var prevFiles = ngModel && ngModel.$modelValue && (angular.isArray(ngModel.$modelValue) ?
-        ngModel.$modelValue : [ngModel.$modelValue]);
-    prevFiles = (prevFiles || attr.$$ngfPrevFiles || []).slice(0);
-    var keepResult = handleKeep(files, prevFiles, attr, scope);
-    files = keepResult.files;
-    var dupFiles = keepResult.dupFiles;
-    var isSingleModel = !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr) && !keepResult.keep;
+    var allNewFiles, dupFiles = [], prevValidFiles, prevInvalidFiles,
+      invalids = [], valids = [];
+
+    function removeDuplicates() {
+      function equals(f1, f2) {
+        return f1.name === f2.name && (f1.$ngfOrigSize || f1.size) === (f2.$ngfOrigSize || f2.size) &&
+          f1.type === f2.type;
+      }
 
-    attr.$$ngfPrevFiles = files;
+      function isInPrevFiles(f) {
+        var j;
+        for (j = 0; j < prevValidFiles.length; j++) {
+          if (equals(f, prevValidFiles[j])) {
+            return true;
+          }
+        }
+        for (j = 0; j < prevInvalidFiles.length; j++) {
+          if (equals(f, prevInvalidFiles[j])) {
+            return true;
+          }
+        }
+        return false;
+      }
 
-    if (keepResult.keep && (!newFiles || !newFiles.length)) return;
+      if (files) {
+        allNewFiles = [];
+        dupFiles = [];
+        for (var i = 0; i < files.length; i++) {
+          if (isInPrevFiles(files[i])) {
+            dupFiles.push(files[i]);
+          } else {
+            allNewFiles.push(files[i]);
+          }
+        }
+      }
+    }
 
-    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
-      $files: files,
-      $file: files && files.length ? files[0] : null,
-      $duplicateFiles: dupFiles,
-      $event: evt
-    });
+    function toArray(v) {
+      return angular.isArray(v) ? v : [v];
+    }
 
-    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
-    var invalids = [];
     function separateInvalids() {
-      var valids = [];
-      angular.forEach(files, function (file) {
+      valids = [];
+      invalids = [];
+      angular.forEach(allNewFiles, function (file) {
         if (file.$error) {
           invalids.push(file);
         } else {
           valids.push(file);
         }
       });
-      files = valids;
     }
 
-    upload.validate(newFiles, ngModel, attr, scope).then(function () {
+    function resizeAndUpdate() {
+      function updateModel() {
+        $timeout(function () {
+          update(keep ? prevValidFiles.concat(valids) : valids,
+            keep ? prevInvalidFiles.concat(invalids) : invalids,
+            files, dupFiles, isSingleModel);
+        }, options && options.debounce ? options.debounce.change || options.debounce : 0);
+      }
+
+      resize(validateAfterResize ? allNewFiles : valids, attr, scope).then(function () {
+        if (validateAfterResize) {
+          upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
+            separateInvalids();
+            updateModel();
+          });
+        } else {
+          updateModel();
+        }
+      }, function (e) {
+        throw 'Could not resize files ' + e;
+      });
+    }
+
+    prevValidFiles = attr.$$ngfPrevValidFiles || [];
+    prevInvalidFiles = attr.$$ngfPrevInvalidFiles || [];
+    if (ngModel && ngModel.$modelValue) {
+      prevValidFiles = toArray(ngModel.$modelValue);
+    }
+
+    var keep = upload.attrGetter('ngfKeep', attr, scope);
+    allNewFiles = (files || []).slice(0);
+    if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
+      removeDuplicates(attr, scope);
+    }
+
+    var isSingleModel = !keep && !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr);
+
+    if (keep && !allNewFiles.length) return;
+
+    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
+      $files: files,
+      $file: files && files.length ? files[0] : null,
+      $newFiles: allNewFiles,
+      $duplicateFiles: dupFiles,
+      $event: evt
+    });
+
+    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
+
+    var allLength = allNewFiles.length + prevValidFiles.length + prevInvalidFiles.length;
+    var options = upload.attrGetter('ngModelOptions', attr, scope);
+    upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
       if (noDelay) {
-        update(files, [], newFiles, dupFiles, isSingleModel);
+        update(allNewFiles, [], files, dupFiles, isSingleModel);
       } else {
-        var options = upload.attrGetter('ngModelOptions', attr, scope);
         if ((!options || !options.allowInvalid) && !validateAfterResize) {
           separateInvalids();
+        } else {
+          valids = allNewFiles;
         }
-        var fixOrientation = upload.emptyPromise(files);
         if (upload.attrGetter('ngfFixOrientation', attr, scope) && upload.isExifSupported()) {
-          fixOrientation = applyExifRotations(files, attr, scope);
-        }
-        fixOrientation.then(function () {
-          function updateModel() {
-            $timeout(function () {
-              update(files, invalids, newFiles, dupFiles, isSingleModel);
-            }, options && options.debounce ? options.debounce.change || options.debounce : 0);
-          }
-          resize(files, attr, scope).then(function () {
-            if (validateAfterResize) {
-              upload.validate(files, ngModel, attr, scope).then(function () {
-                separateInvalids();
-                updateModel();
-              });
-            } else {
-              updateModel();
-            }
-          }, function (e) {
-            throw 'Could not resize files ' + e;
+          applyExifRotations(valids, attr, scope).then(function () {
+            resizeAndUpdate();
           });
-        });
+        } else {
+          resizeAndUpdate();
+        }
       }
     });
-
-    // cleaning object url memories
-    var l = prevFiles.length;
-    while (l--) {
-      var prevFile = prevFiles[l];
-      if (window.URL && prevFile.blobUrl) {
-        URL.revokeObjectURL(prevFile.blobUrl);
-        delete prevFile.blobUrl;
-      }
-    }
   };
 
   return upload;
@@ -925,7 +949,20 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
             }
             $timeout(function () {
               file.$ngfBlobUrl = url;
-              if (url) deferred.resolve(url, file);
+              if (url) {
+                deferred.resolve(url, file);
+                upload.blobUrls = upload.blobUrls || [];
+                upload.blobUrlsTotalSize = upload.blobUrlsTotalSize || 0;
+                upload.blobUrls.push({url: url, size: file.size});
+                upload.blobUrlsTotalSize += file.size || 0;
+                var maxMemory = upload.defaults.blobUrlsMaxMemory || 268435456;
+                var maxLength = upload.defaults.blobUrlsMaxQueueSize || 200;
+                while ((upload.blobUrlsTotalSize > maxMemory || upload.blobUrls.length > maxLength) && upload.blobUrls.length > 1) {
+                  var obj = upload.blobUrls.splice(0, 1)[0];
+                  URL.revokeObjectURL(obj.url);
+                  upload.blobUrlsTotalSize -= obj.size;
+                }
+              }
             });
           } else {
             var fileReader = new FileReader();
@@ -933,6 +970,9 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
               $timeout(function () {
                 file.$ngfDataUrl = e.target.result;
                 deferred.resolve(e.target.result, file);
+                $timeout(function () {
+                  delete file.$ngfDataUrl;
+                }, 1000);
               });
             };
             fileReader.onerror = function () {
@@ -945,7 +985,7 @@ ngFileUpload.directive('ngfSelect', ['$parse', '$timeout', '$compile', 'Upload',
           }
         } else {
           $timeout(function () {
-            file[disallowObjectUrl ? 'dataUrl' : 'blobUrl'] = '';
+            file[disallowObjectUrl ? '$ngfDataUrl' : '$ngfBlobUrl'] = '';
             deferred.reject();
           });
         }
@@ -1176,7 +1216,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           if (files && !angular.isArray(files)) {
             files = [files];
           }
-          upload.validate(files, ngModel, attr, scope).then(function () {
+          upload.validate(files, files ? files.length : 0, ngModel, attr, scope).then(function () {
             upload.applyModelValidation(ngModel, files);
           });
         }
@@ -1217,7 +1257,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
     return val;
   };
 
-  upload.validate = function (files, ngModel, attr, scope) {
+  upload.validate = function (files, allLength, ngModel, attr, scope) {
     ngModel = ngModel || {};
     ngModel.$ngfValidations = ngModel.$ngfValidations || [];
 
@@ -1245,6 +1285,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
             if (val != null) {
               if (!fn(file, val)) {
                 file.$error = name;
+                (file.$errorMessages = (file.$errorMessages || {})).name = true;
                 file.$errorParam = val;
                 files.splice(i, 1);
                 valid = false;
@@ -1258,16 +1299,15 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
       }
     }
 
-    var filesLength = files.length;
     validateSync('maxFiles', null, function (file, val) {
-      return filesLength <= val;
+      return allLength <= val;
     });
     validateSync('pattern', null, upload.validatePattern);
     validateSync('minSize', 'size.min', function (file, val) {
-      return file.size >= upload.translateScalars(val);
+      return file.size + 0.1 >= upload.translateScalars(val);
     });
     validateSync('maxSize', 'size.max', function (file, val) {
-      return file.size <= upload.translateScalars(val);
+      return file.size - 0.1 <= upload.translateScalars(val);
     });
     var totalSize = 0;
     validateSync('maxTotalSize', null, function (file, val) {
@@ -1293,6 +1333,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           asyncFn(file, val).then(function (d) {
             if (!fn(d, val)) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -1301,6 +1342,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           }, function () {
             if (attrGetter('ngfValidateForce', {$file: file})) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -1624,7 +1666,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     return deferred.promise;
   };
 
-  upload.dataUrltoBlob = function (dataurl, name) {
+  upload.dataUrltoBlob = function (dataurl, name, origSize) {
     var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
       bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
     while (n--) {
@@ -1632,6 +1674,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     }
     var blob = new window.Blob([u8arr], {type: mime});
     blob.name = name;
+    blob.$ngfOrigSize = origSize;
     return blob;
   };
 
@@ -1667,7 +1710,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               setTimeout(function () {throw e;}, 1);
             }
           }
-          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name));
+          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name, file.size));
         }, function (r) {
           if (r === 'resizeIf') {
             deferred.resolve(file);
@@ -1791,12 +1834,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       if (stopPropagation(scope)) evt.stopPropagation();
       if (actualDragOverClass) elem.removeClass(actualDragOverClass);
       actualDragOverClass = null;
-      extractFiles(evt, attrGetter('ngfAllowDir', scope) !== false,
+      var items = evt.dataTransfer.items;
+      var html;
+      try {
+        html = evt.dataTransfer && evt.dataTransfer.getData && evt.dataTransfer.getData('text/html');
+      } catch (e) {/* Fix IE11 that throw error calling getData */
+      }
+
+      extractFiles(items, evt.dataTransfer.files, attrGetter('ngfAllowDir', scope) !== false,
         attrGetter('multiple') || attrGetter('ngfMultiple', scope)).then(function (files) {
         if (files.length) {
           updateModel(files, evt);
         } else {
-          extractFilesFromHtml('dropUrl', evt.dataTransfer).then(function (files) {
+          extractFilesFromHtml('dropUrl', html).then(function (files) {
             updateModel(files, evt);
           });
         }
@@ -1840,12 +1890,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       upload.updateModel(ngModel, attr, scope, attrGetter('ngfChange') || attrGetter('ngfDrop'), files, evt);
     }
 
-    function extractFilesFromHtml(updateOn, obj) {
-      var html;
-      try {
-        html = (obj && obj.getData && obj.getData('text/html'));
-      } catch (e) {/* Fix IE11 that throw error calling getData */
-      }
+    function extractFilesFromHtml(updateOn, html) {
       if (!upload.shouldUpdateOn(updateOn, attr, scope) || !html) return upload.rejectPromise([]);
       var urls = [];
       html.replace(/<(img src|img [^>]* src) *=\"([^\"]*)\"/gi, function (m, n, src) {
@@ -1895,18 +1940,19 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
       callback(dClass);
     }
 
-    function extractFiles(evt, allowDir, multiple) {
+    function extractFiles(items, fileList, allowDir, multiple) {
       var maxFiles = upload.getValidationAttr(attr, scope, 'maxFiles') || Number.MAX_VALUE;
       var maxTotalSize = upload.getValidationAttr(attr, scope, 'maxTotalSize') || Number.MAX_VALUE;
       var includeDir = attrGetter('ngfIncludeDir', scope);
       var files = [], totalSize = 0;
+
       function traverseFileTree(entry, path) {
         var defer = $q.defer();
         if (entry != null) {
           if (entry.isDirectory) {
             var promises = [upload.emptyPromise()];
             if (includeDir) {
-              var file = {type : 'directory'};
+              var file = {type: 'directory'};
               file.name = file.path = (path || '') + entry.name + entry.name;
               files.push(file);
             }
@@ -1916,7 +1962,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               dirReader.readEntries(function (results) {
                 try {
                   if (!results.length) {
-                    angular.forEach(entries.slice(0), function(e) {
+                    angular.forEach(entries.slice(0), function (e) {
                       if (files.length <= maxFiles && totalSize <= maxTotalSize) {
                         promises.push(traverseFileTree(e, (path ? path : '') + entry.name + '/'));
                       }
@@ -1961,7 +2007,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var promises = [upload.emptyPromise()];
 
-      var items = evt.dataTransfer.items;
       if (items && items.length > 0 && $location.protocol() !== 'file') {
         for (var i = 0; i < items.length; i++) {
           if (items[i].webkitGetAsEntry && items[i].webkitGetAsEntry() && items[i].webkitGetAsEntry().isDirectory) {
@@ -1983,7 +2028,6 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
             (!multiple && files.length > 0)) break;
         }
       } else {
-        var fileList = evt.dataTransfer.files;
         if (fileList != null) {
           for (var j = 0; j < fileList.length; j++) {
             var file = fileList.item(j);
@@ -1999,12 +2043,12 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
 
       var defer = $q.defer();
       $q.all(promises).then(function () {
-        if (!multiple) {
+        if (!multiple && !includeDir) {
           var i = 0;
-          while (files.length && files[i].type === 'directory') i++;
+          while (files[i] && files[i].type === 'directory') i++;
           defer.resolve([files[i]]);
         } else {
-            defer.resolve(files);
+          defer.resolve(files);
         }
       }, function (e) {
         defer.reject(e);
diff --git a/dist/ng-file-upload.min.js b/dist/ng-file-upload.min.js
index a209c8cf..80d18c19 100644
--- a/dist/ng-file-upload.min.js
+++ b/dist/ng-file-upload.min.js
@@ -1,4 +1,3 @@
-/*! 11.2.3 */
-!window.XMLHttpRequest||window.FileAPI&&FileAPI.shouldLoad||(window.XMLHttpRequest.prototype.setRequestHeader=function(a){return function(b,c){if("__setXHR_"===b){var d=c(this);d instanceof Function&&d(this)}else a.apply(this,arguments)}}(window.XMLHttpRequest.prototype.setRequestHeader));var ngFileUpload=angular.module("ngFileUpload",[]);ngFileUpload.version="11.2.3",ngFileUpload.service("UploadBase",["$http","$q","$timeout",function(a,b,c){function d(d){function e(a){j.notify&&j.notify(a),k.progressFunc&&c(function(){k.progressFunc(a)})}function h(a){return null!=d._start&&g?{loaded:a.loaded+d._start,total:d._file&&d._file.size||a.total,type:a.type,config:d,lengthComputable:!0,target:a.target}:a}function i(){a(d).then(function(a){g&&d._chunkSize&&!d._finished&&d._file?(e({loaded:d._end,total:d._file&&d._file.size,config:d,type:"progress"}),f.upload(d,!0)):(d._finished&&delete d._finished,j.resolve(a))},function(a){j.reject(a)},function(a){j.notify(a)})}d.method=d.method||"POST",d.headers=d.headers||{};var j=d._deferred=d._deferred||b.defer(),k=j.promise;return d.disableProgress||(d.headers.__setXHR_=function(){return function(a){a&&(d.__XHR=a,d.xhrFn&&d.xhrFn(a),a.upload.addEventListener("progress",function(a){a.config=d,e(h(a))},!1),a.upload.addEventListener("load",function(a){a.lengthComputable&&(a.config=d,e(h(a)))},!1))}}),g?d._chunkSize&&d._end&&!d._finished?(d._start=d._end,d._end+=d._chunkSize,i()):d.resumeSizeUrl?a.get(d.resumeSizeUrl).then(function(a){d._start=d.resumeSizeResponseReader?d.resumeSizeResponseReader(a.data):parseInt((null==a.data.size?a.data:a.data.size).toString()),d._chunkSize&&(d._end=d._start+d._chunkSize),i()},function(a){throw a}):d.resumeSize?d.resumeSize().then(function(a){d._start=a,i()},function(a){throw a}):(d._chunkSize&&(d._start=0,d._end=d._start+d._chunkSize),i()):i(),k.success=function(a){return k.then(function(b){a(b.data,b.status,b.headers,d)}),k},k.error=function(a){return k.then(null,function(b){a(b.data,b.status,b.headers,d)}),k},k.progress=function(a){return k.progressFunc=a,k.then(null,null,function(b){a(b)}),k},k.abort=k.pause=function(){return d.__XHR&&c(function(){d.__XHR.abort()}),k},k.xhr=function(a){return d.xhrFn=function(b){return function(){b&&b.apply(k,arguments),a.apply(k,arguments)}}(d.xhrFn),k},f.promisesCount++,k["finally"](function(){f.promisesCount--}),k}function e(a){var b={};for(var c in a)a.hasOwnProperty(c)&&(b[c]=a[c]);return b}var f=this;f.promisesCount=0,this.isResumeSupported=function(){return window.Blob&&window.Blob instanceof Function&&(new window.Blob).slice};var g=this.isResumeSupported();this.isUploadInProgress=function(){return f.promisesCount>0},this.rename=function(a,b){return a.ngfName=b,a},this.jsonBlob=function(a){null==a||angular.isString(a)||(a=JSON.stringify(a));var b=new window.Blob([a],{type:"application/json"});return b._ngfBlob=!0,b},this.json=function(a){return angular.toJson(a)},this.isFile=function(a){return null!=a&&(a instanceof window.Blob||a.flashId&&a.name&&a.size)},this.upload=function(a,b){function c(b,c){if(b._ngfBlob)return b;if(a._file=a._file||b,null!=a._start&&g){a._end&&a._end>=b.size&&(a._finished=!0,a._end=b.size);var d=b.slice(a._start,a._end||b.size);return d.name=b.name,d.ngfName=b.ngfName,a._chunkSize&&(c.append("_chunkSize",a._chunkSize),c.append("_currentChunkSize",a._end-a._start),c.append("_chunkNumber",Math.floor(a._start/a._chunkSize)),c.append("_totalSize",a._file.size)),d}return b}function h(b,d,e){if(void 0!==d)if(angular.isDate(d)&&(d=d.toISOString()),angular.isString(d))b.append(e,d);else if(f.isFile(d)){var g=c(d,b),i=e.split(",");i[1]&&(g.ngfName=i[1].replace(/^\s+|\s+$/g,""),e=i[0]),a._fileKey=a._fileKey||e,b.append(e,g,g.ngfName||g.name)}else if(angular.isObject(d)){if(d.$$ngfCircularDetection)throw"ngFileUpload: Circular reference in config.data. Make sure specified data for Upload.upload() has no circular reference: "+e;d.$$ngfCircularDetection=!0;try{for(var j in d)if(d.hasOwnProperty(j)&&"$$ngfCircularDetection"!==j){var k=null==a.objectKey?"[i]":a.objectKey;d.length&&parseInt(j)>-1&&(k=null==a.arrayKey?k:a.arrayKey),h(b,d[j],e+k.replace(/[ik]/g,j))}}finally{delete d.$$ngfCircularDetection}}else b.append(e,d)}function i(){a._chunkSize=f.translateScalars(a.resumeChunkSize),a._chunkSize=a._chunkSize?parseInt(a._chunkSize.toString()):null,a.headers=a.headers||{},a.headers["Content-Type"]=void 0,a.transformRequest=a.transformRequest?angular.isArray(a.transformRequest)?a.transformRequest:[a.transformRequest]:[],a.transformRequest.push(function(b){var c,d=new window.FormData;b=b||a.fields||{},a.file&&(b.file=a.file);for(c in b)if(b.hasOwnProperty(c)){var e=b[c];a.formDataAppender?a.formDataAppender(d,c,e):h(d,e,c)}return d})}return b||(a=e(a)),a._isDigested||(a._isDigested=!0,i()),d(a)},this.http=function(b){return b=e(b),b.transformRequest=b.transformRequest||function(b){return window.ArrayBuffer&&b instanceof window.ArrayBuffer||b instanceof window.Blob?b:a.defaults.transformRequest[0].apply(this,arguments)},b._chunkSize=f.translateScalars(b.resumeChunkSize),b._chunkSize=b._chunkSize?parseInt(b._chunkSize.toString()):null,d(b)},this.translateScalars=function(a){if(angular.isString(a)){if(a.search(/kb/i)===a.length-2)return parseFloat(1e3*a.substring(0,a.length-2));if(a.search(/mb/i)===a.length-2)return parseFloat(1e6*a.substring(0,a.length-2));if(a.search(/gb/i)===a.length-2)return parseFloat(1e9*a.substring(0,a.length-2));if(a.search(/b/i)===a.length-1)return parseFloat(a.substring(0,a.length-1));if(a.search(/s/i)===a.length-1)return parseFloat(a.substring(0,a.length-1));if(a.search(/m/i)===a.length-1)return parseFloat(60*a.substring(0,a.length-1));if(a.search(/h/i)===a.length-1)return parseFloat(3600*a.substring(0,a.length-1))}return a},this.urlToBlob=function(c){var d=b.defer();return a({url:c,method:"get",responseType:"arraybuffer"}).then(function(a){var b=new Uint8Array(a.data),c=a.headers("content-type")||"image/WebP",e=new window.Blob([b],{type:c});d.resolve(e)},function(a){d.reject(a)}),d.promise},this.setDefaults=function(a){this.defaults=a||{}},this.defaults={},this.version=ngFileUpload.version}]),ngFileUpload.service("Upload",["$parse","$timeout","$compile","$q","UploadExif",function(a,b,c,d,e){function f(a,b,c){var e=[i.emptyPromise()];return angular.forEach(a,function(d,f){0===d.type.indexOf("image/jpeg")&&i.attrGetter("ngfFixOrientation",b,c,{$file:d})&&e.push(i.happyPromise(i.applyExifRotation(d),d).then(function(b){a.splice(f,1,b)}))}),d.all(e)}function g(a,b,c){var e=i.attrGetter("ngfResize",b,c);if(!(e&&angular.isObject(e)&&i.isResizeSupported()&&a.length))return i.emptyPromise();var f=[i.emptyPromise()];return angular.forEach(a,function(d,g){if(0===d.type.indexOf("image")){if(e.pattern&&!i.validatePattern(d,e.pattern))return;var h=i.resize(d,e.width,e.height,e.quality,e.type,e.ratio,e.centerCrop,function(a,e){return i.attrGetter("ngfResizeIf",b,c,{$width:a,$height:e,$file:d})},e.restoreExif!==!1);f.push(h),h.then(function(b){a.splice(g,1,b)},function(a){d.$error="resize",d.$errorParam=(a?(a.message?a.message:a)+": ":"")+(d&&d.name)})}}),d.all(f)}function h(a,b,c,d){var e=[],f=i.attrGetter("ngfKeep",c,d);if(f){var g=!1;if("distinct"===f||i.attrGetter("ngfKeepDistinct",c,d)===!0){var h=b.length;if(a)for(var j=0;j<a.length;j++){for(var k=0;h>k;k++)if(a[j].name===b[k].name){e.push(a[j]);break}k===h&&(b.push(a[j]),g=!0)}a=b}else a=b.concat(a||[])}return{files:a,dupFiles:e,keep:f}}var i=e;return i.getAttrWithDefaults=function(a,b){if(null!=a[b])return a[b];var c=i.defaults[b];return null==c?c:angular.isString(c)?c:JSON.stringify(c)},i.attrGetter=function(b,c,d,e){var f=this.getAttrWithDefaults(c,b);if(!d)return f;try{return e?a(f)(d,e):a(f)(d)}catch(g){if(b.search(/min|max|pattern/i))return f;throw g}},i.shouldUpdateOn=function(a,b,c){var d=i.attrGetter("ngModelOptions",b,c);return d&&d.updateOn?d.updateOn.split(" ").indexOf(a)>-1:!0},i.emptyPromise=function(){var a=d.defer(),c=arguments;return b(function(){a.resolve.apply(a,c)}),a.promise},i.rejectPromise=function(){var a=d.defer(),c=arguments;return b(function(){a.reject.apply(a,c)}),a.promise},i.happyPromise=function(a,c){var e=d.defer();return a.then(function(a){e.resolve(a)},function(a){b(function(){throw a}),e.resolve(c)}),e.promise},i.updateModel=function(c,d,e,j,k,l,m){function n(f,g,h,k,m){var n=f&&f.length?f[0]:null;c&&(i.applyModelValidation(c,f),c.$setViewValue(m?n:f)),j&&a(j)(e,{$files:f,$file:n,$newFiles:h,$duplicateFiles:k,$invalidFiles:g,$event:l});var o=i.attrGetter("ngfModelInvalid",d);o&&b(function(){a(o).assign(e,g)}),b(function(){})}function o(){var a=[];angular.forEach(k,function(b){b.$error?v.push(b):a.push(b)}),k=a}var p=k,q=c&&c.$modelValue&&(angular.isArray(c.$modelValue)?c.$modelValue:[c.$modelValue]);q=(q||d.$$ngfPrevFiles||[]).slice(0);var r=h(k,q,d,e);k=r.files;var s=r.dupFiles,t=!i.attrGetter("ngfMultiple",d,e)&&!i.attrGetter("multiple",d)&&!r.keep;if(d.$$ngfPrevFiles=k,!r.keep||p&&p.length){i.attrGetter("ngfBeforeModelChange",d,e,{$files:k,$file:k&&k.length?k[0]:null,$duplicateFiles:s,$event:l});var u=i.attrGetter("ngfValidateAfterResize",d,e),v=[];i.validate(p,c,d,e).then(function(){if(m)n(k,[],p,s,t);else{var a=i.attrGetter("ngModelOptions",d,e);a&&a.allowInvalid||u||o();var h=i.emptyPromise(k);i.attrGetter("ngfFixOrientation",d,e)&&i.isExifSupported()&&(h=f(k,d,e)),h.then(function(){function f(){b(function(){n(k,v,p,s,t)},a&&a.debounce?a.debounce.change||a.debounce:0)}g(k,d,e).then(function(){u?i.validate(k,c,d,e).then(function(){o(),f()}):f()},function(a){throw"Could not resize files "+a})})}});for(var w=q.length;w--;){var x=q[w];window.URL&&x.blobUrl&&(URL.revokeObjectURL(x.blobUrl),delete x.blobUrl)}}},i}]),ngFileUpload.directive("ngfSelect",["$parse","$timeout","$compile","Upload",function(a,b,c,d){function e(a){var b=a.match(/Android[^\d]*(\d+)\.(\d+)/);if(b&&b.length>2){var c=d.defaults.androidFixMinorVersion||4;return parseInt(b[1])<4||parseInt(b[1])===c&&parseInt(b[2])<c}return-1===a.indexOf("Chrome")&&/.*Windows.*Safari.*/.test(a)}function f(a,b,c,d,f,h,i,j){function k(){return"input"===b[0].tagName.toLowerCase()&&c.type&&"file"===c.type.toLowerCase()}function l(){return t("ngfChange")||t("ngfSelect")}function m(b){if(j.shouldUpdateOn("change",c,a)){for(var e=b.__files_||b.target&&b.target.files,f=[],g=0;g<e.length;g++)f.push(e[g]);j.updateModel(d,c,a,l(),f.length?f:null,b)}}function n(a){if(b!==a)for(var c=0;c<b[0].attributes.length;c++){var d=b[0].attributes[c];"type"!==d.name&&"class"!==d.name&&"style"!==d.name&&((null==d.value||""===d.value)&&("required"===d.name&&(d.value="required"),"multiple"===d.name&&(d.value="multiple")),a.attr(d.name,"id"===d.name?"ngf-"+d.value:d.value))}}function o(){if(k())return b;var a=angular.element('<input type="file">');n(a);var c=angular.element("<label>upload</label>");return c.css("visibility","hidden").css("position","absolute").css("overflow","hidden").css("width","0px").css("height","0px").css("border","none").css("margin","0px").css("padding","0px").attr("tabindex","-1"),g.push({el:b,ref:c}),document.body.appendChild(c.append(a)[0]),a}function p(c){if(b.attr("disabled"))return!1;if(!t("ngfSelectDisabled",a)){var d=q(c);if(null!=d)return d;r(c);try{k()||document.body.contains(w[0])||(g.push({el:b,ref:w.parent()}),document.body.appendChild(w[0].parent()),w.bind("change",m))}catch(f){}return e(navigator.userAgent)?setTimeout(function(){w[0].click()},0):w[0].click(),!1}}function q(a){var b=a.changedTouches||a.originalEvent&&a.originalEvent.changedTouches;if("touchstart"===a.type)return v=b?b[0].clientY:0,!0;if(a.stopPropagation(),a.preventDefault(),"touchend"===a.type){var c=b?b[0].clientY:0;if(Math.abs(c-v)>20)return!1}}function r(b){j.shouldUpdateOn("click",c,a)&&w.val()&&(w.val(null),j.updateModel(d,c,a,l(),null,b,!0))}function s(a){if(w&&!w.attr("__ngf_ie10_Fix_")){if(!w[0].parentNode)return void(w=null);a.preventDefault(),a.stopPropagation(),w.unbind("click");var b=w.clone();return w.replaceWith(b),w=b,w.attr("__ngf_ie10_Fix_","true"),w.bind("change",m),w.bind("click",s),w[0].click(),!1}w.removeAttr("__ngf_ie10_Fix_")}var t=function(a,b){return j.attrGetter(a,c,b)};j.registerModelChangeValidator(d,c,a);var u=[];u.push(a.$watch(t("ngfMultiple"),function(){w.attr("multiple",t("ngfMultiple",a))})),u.push(a.$watch(t("ngfCapture"),function(){w.attr("capture",t("ngfCapture",a))})),u.push(a.$watch(t("ngfAccept"),function(){w.attr("accept",t("ngfAccept",a))})),c.$observe("accept",function(){w.attr("accept",t("accept"))}),u.push(function(){c.$$observers&&delete c.$$observers.accept});var v=0,w=b;k()||(w=o()),w.bind("change",m),k()?b.bind("click",r):b.bind("click touchstart touchend",p),-1!==navigator.appVersion.indexOf("MSIE 10")&&w.bind("click",s),d&&d.$formatters.push(function(a){return(null==a||0===a.length)&&w.val()&&w.val(null),a}),a.$on("$destroy",function(){k()||w.parent().remove(),angular.forEach(u,function(a){a()})}),h(function(){for(var a=0;a<g.length;a++){var b=g[a];document.body.contains(b.el[0])||(g.splice(a,1),b.ref.remove())}}),window.FileAPI&&window.FileAPI.ngfFixIE&&window.FileAPI.ngfFixIE(b,w,m)}var g=[];return{restrict:"AEC",require:"?ngModel",link:function(e,g,h,i){f(e,g,h,i,a,b,c,d)}}}]),function(){function a(a){return"img"===a.tagName.toLowerCase()?"image":"audio"===a.tagName.toLowerCase()?"audio":"video"===a.tagName.toLowerCase()?"video":/./}function b(b,c,d,e,f,g,h,i){function j(a){var g=b.attrGetter("ngfNoObjectUrl",f,d);b.dataUrl(a,g)["finally"](function(){c(function(){var b=(g?a.$ngfDataUrl:a.$ngfBlobUrl)||a.$ngfDataUrl;i?e.css("background-image","url('"+(b||"")+"')"):e.attr("src",b),b?e.removeClass("ng-hide"):e.addClass("ng-hide")})})}c(function(){var c=d.$watch(f[g],function(c){var d=h;if("ngfThumbnail"===g&&(d||(d={width:e[0].clientWidth,height:e[0].clientHeight}),0===d.width&&window.getComputedStyle)){var f=getComputedStyle(e[0]);d={width:parseInt(f.width.slice(0,-2)),height:parseInt(f.height.slice(0,-2))}}return 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k.all(f).then(function(){h.resolve(g)},function(a){h.reject(a)}),h.promise}}function o(a,b,c,d){var e=r("ngfDragOverClass",a,{$event:c}),f="dragover";if(angular.isString(e))f=e;else if(e&&(e.delay&&(v=e.delay),e.accept||e.reject)){var g=c.dataTransfer.items;if(null!=g&&g.length)for(var h=e.pattern||r("ngfPattern",a,{$event:c}),j=g.length;j--;){if(!i.validatePattern(g[j],h)){f=e.reject;break}f=e.accept}else f=e.accept}d(f)}function p(b,c,e,f){function g(a,b){var c=k.defer();if(null!=a)if(a.isDirectory){var d=[i.emptyPromise()];if(m){var e={type:"directory"};e.name=e.path=(b||"")+a.name+a.name,n.push(e)}var f=a.createReader(),h=[],p=function(){f.readEntries(function(e){try{e.length?(h=h.concat(Array.prototype.slice.call(e||[],0)),p()):(angular.forEach(h.slice(0),function(c){n.length<=j&&l>=o&&d.push(g(c,(b?b:"")+a.name+"/"))}),k.all(d).then(function(){c.resolve()},function(a){c.reject(a)}))}catch(f){c.reject(f)}},function(a){c.reject(a)})};p()}else a.file(function(a){try{a.path=(b?b:"")+a.name,m&&(a=i.rename(a,a.path)),n.push(a),o+=a.size,c.resolve()}catch(d){c.reject(d)}},function(a){c.reject(a)});return c.promise}var j=i.getValidationAttr(d,a,"maxFiles")||Number.MAX_VALUE,l=i.getValidationAttr(d,a,"maxTotalSize")||Number.MAX_VALUE,m=r("ngfIncludeDir",a),n=[],o=0,p=[i.emptyPromise()];if(b&&b.length>0&&"file"!==h.protocol())for(var q=0;q<b.length;q++){if(b[q].webkitGetAsEntry&&b[q].webkitGetAsEntry()&&b[q].webkitGetAsEntry().isDirectory){var s=b[q].webkitGetAsEntry();if(s.isDirectory&&!e)continue;null!=s&&p.push(g(s))}else{var t=b[q].getAsFile();null!=t&&(n.push(t),o+=t.size)}if(n.length>j||o>l||!f&&n.length>0)break}else if(null!=c)for(var u=0;u<c.length;u++){var v=c.item(u);if((v.type||v.size>0)&&(n.push(v),o+=v.size),n.length>j||o>l||!f&&n.length>0)break}var w=k.defer();return k.all(p).then(function(){if(f||m)w.resolve(n);else{for(var a=0;n[a]&&"directory"===n[a].type;)a++;w.resolve([n[a]])}},function(a){w.reject(a)}),w.promise}var q=b(),r=function(a,b,c){return i.attrGetter(a,d,b,c)};if(r("dropAvailable")&&g(function(){a[r("dropAvailable")]?a[r("dropAvailable")].value=q:a[r("dropAvailable")]=q}),!q)return void(r("ngfHideOnDropNotAvailable",a)===!0&&c.css("display","none"));null==r("ngfSelect")&&i.registerModelChangeValidator(e,d,a);var s,t=null,u=f(r("ngfStopPropagation")),v=1;c[0].addEventListener("dragover",function(b){if(!l()&&i.shouldUpdateOn("drop",d,a)){if(b.preventDefault(),u(a)&&b.stopPropagation(),navigator.userAgent.indexOf("Chrome")>-1){var e=b.dataTransfer.effectAllowed;b.dataTransfer.dropEffect="move"===e||"linkMove"===e?"move":"copy"}g.cancel(t),s||(s="C",o(a,d,b,function(d){s=d,c.addClass(s),r("ngfDrag",a,{$isDragging:!0,$class:s,$event:b})}))}},!1),c[0].addEventListener("dragenter",function(b){!l()&&i.shouldUpdateOn("drop",d,a)&&(b.preventDefault(),u(a)&&b.stopPropagation())},!1),c[0].addEventListener("dragleave",function(b){!l()&&i.shouldUpdateOn("drop",d,a)&&(b.preventDefault(),u(a)&&b.stopPropagation(),t=g(function(){s&&c.removeClass(s),s=null,r("ngfDrag",a,{$isDragging:!1,$event:b})},v||100))},!1),c[0].addEventListener("drop",function(b){if(!l()&&i.shouldUpdateOn("drop",d,a)){b.preventDefault(),u(a)&&b.stopPropagation(),s&&c.removeClass(s),s=null;var e,f=b.dataTransfer.items;try{e=b.dataTransfer&&b.dataTransfer.getData&&b.dataTransfer.getData("text/html")}catch(g){}p(f,b.dataTransfer.files,r("ngfAllowDir",a)!==!1,r("multiple")||r("ngfMultiple",a)).then(function(a){a.length?m(a,b):n("dropUrl",e).then(function(a){m(a,b)})})}},!1),c[0].addEventListener("paste",function(b){if(navigator.userAgent.toLowerCase().indexOf("firefox")>-1&&r("ngfEnableFirefoxPaste",a)&&b.preventDefault(),!l()&&i.shouldUpdateOn("paste",d,a)){var c=[],e=b.clipboardData||b.originalEvent.clipboardData;if(e&&e.items)for(var f=0;f<e.items.length;f++)-1!==e.items[f].type.indexOf("image")&&c.push(e.items[f].getAsFile());c.length?m(c,b):n("pasteUrl",e).then(function(a){m(a,b)})}},!1),navigator.userAgent.toLowerCase().indexOf("firefox")>-1&&r("ngfEnableFirefoxPaste",a)&&(c.attr("contenteditable",!0),c.on("keypress",function(a){a.metaKey||a.ctrlKey||a.preventDefault()}))}function b(){var a=document.createElement("div");return"draggable"in a&&"ondrop"in a&&!/Edge\/12./i.test(navigator.userAgent)}ngFileUpload.directive("ngfDrop",["$parse","$timeout","$location","Upload","$http","$q",function(b,c,d,e,f,g){return{restrict:"AEC",require:"?ngModel",link:function(h,i,j,k){a(h,i,j,k,b,c,d,e,f,g)}}}]),ngFileUpload.directive("ngfNoFileDrop",function(){return function(a,c){b()&&c.css("display","none")}}),ngFileUpload.directive("ngfDropAvailable",["$parse","$timeout","Upload",function(a,c,d){
+return function(e,f,g){if(b()){var h=a(d.attrGetter("ngfDropAvailable",g));c(function(){h(e),h.assign&&h.assign(e,!0)})}}}])}(),ngFileUpload.service("UploadExif",["UploadResize","$q",function(a,b){function c(a,b,c,d){switch(b){case 2:return a.transform(-1,0,0,1,c,0);case 3:return a.transform(-1,0,0,-1,c,d);case 4:return a.transform(1,0,0,-1,0,d);case 5:return a.transform(0,1,1,0,0,0);case 6:return a.transform(0,1,-1,0,d,0);case 7:return a.transform(0,-1,-1,0,d,c);case 8:return a.transform(0,-1,1,0,0,c)}}function d(a){for(var b="",c=new Uint8Array(a),d=c.byteLength,e=0;d>e;e++)b+=String.fromCharCode(c[e]);return window.btoa(b)}var e=a;return e.isExifSupported=function(){return window.FileReader&&(new FileReader).readAsArrayBuffer&&e.isResizeSupported()},e.readOrientation=function(a){var c=b.defer(),d=new FileReader,e=a.slice(0,65536);return d.readAsArrayBuffer(e),d.onerror=function(a){return c.reject(a)},d.onload=function(a){var b={orientation:1},d=new DataView(this.result);if(65496!==d.getUint16(0,!1))return c.resolve(b);for(var e=d.byteLength,f=2;e>f;){var g=d.getUint16(f,!1);if(f+=2,65505===g){if(1165519206!==d.getUint32(f+=2,!1))return c.resolve(b);var h=18761===d.getUint16(f+=6,!1);f+=d.getUint32(f+4,h);var i=d.getUint16(f,h);f+=2;for(var j=0;i>j;j++)if(274===d.getUint16(f+12*j,h)){var k=d.getUint16(f+12*j+8,h);return k>=2&&8>=k&&(d.setUint16(f+12*j+8,1,h),b.fixedArrayBuffer=a.target.result),b.orientation=k,c.resolve(b)}}else{if(65280!==(65280&g))break;f+=d.getUint16(f,!1)}}return c.resolve(b)},c.promise},e.applyExifRotation=function(a){if(0!==a.type.indexOf("image/jpeg"))return e.emptyPromise(a);var f=b.defer();return e.readOrientation(a).then(function(b){return b.orientation<2||b.orientation>8?f.resolve(a):void e.dataUrl(a,!0).then(function(g){var h=document.createElement("canvas"),i=document.createElement("img");i.onload=function(){try{h.width=b.orientation>4?i.height:i.width,h.height=b.orientation>4?i.width:i.height;var g=h.getContext("2d");c(g,b.orientation,i.width,i.height),g.drawImage(i,0,0);var j=h.toDataURL(a.type||"image/WebP",.934);j=e.restoreExif(d(b.fixedArrayBuffer),j);var k=e.dataUrltoBlob(j,a.name);f.resolve(k)}catch(l){return f.reject(l)}},i.onerror=function(){f.reject()},i.src=g},function(a){f.reject(a)})},function(a){f.reject(a)}),f.promise},e.restoreExif=function(a,b){var c={};return c.KEY_STR="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",c.encode64=function(a){var b,c,d,e,f,g="",h="",i="",j=0;do b=a[j++],c=a[j++],h=a[j++],d=b>>2,e=(3&b)<<4|c>>4,f=(15&c)<<2|h>>6,i=63&h,isNaN(c)?f=i=64:isNaN(h)&&(i=64),g=g+this.KEY_STR.charAt(d)+this.KEY_STR.charAt(e)+this.KEY_STR.charAt(f)+this.KEY_STR.charAt(i),b=c=h="",d=e=f=i="";while(j<a.length);return g},c.restore=function(a,b){a.match("data:image/jpeg;base64,")&&(a=a.replace("data:image/jpeg;base64,",""));var c=this.decode64(a),d=this.slice2Segments(c),e=this.exifManipulation(b,d);return"data:image/jpeg;base64,"+this.encode64(e)},c.exifManipulation=function(a,b){var c=this.getExifArray(b),d=this.insertExif(a,c);return new Uint8Array(d)},c.getExifArray=function(a){for(var b,c=0;c<a.length;c++)if(b=a[c],255===b[0]&225===b[1])return b;return[]},c.insertExif=function(a,b){var c=a.replace("data:image/jpeg;base64,",""),d=this.decode64(c),e=d.indexOf(255,3),f=d.slice(0,e),g=d.slice(e),h=f;return h=h.concat(b),h=h.concat(g)},c.slice2Segments=function(a){for(var b=0,c=[];;){if(255===a[b]&218===a[b+1])break;if(255===a[b]&216===a[b+1])b+=2;else{var d=256*a[b+2]+a[b+3],e=b+d+2,f=a.slice(b,e);c.push(f),b=e}if(b>a.length)break}return c},c.decode64=function(a){var b,c,d,e,f,g="",h="",i=0,j=[],k=/[^A-Za-z0-9\+\/\=]/g;k.exec(a)&&console.log("There were invalid base64 characters in the input text.\nValid base64 characters are A-Z, a-z, 0-9, NaNExpect errors in decoding."),a=a.replace(/[^A-Za-z0-9\+\/\=]/g,"");do d=this.KEY_STR.indexOf(a.charAt(i++)),e=this.KEY_STR.indexOf(a.charAt(i++)),f=this.KEY_STR.indexOf(a.charAt(i++)),h=this.KEY_STR.indexOf(a.charAt(i++)),b=d<<2|e>>4,c=(15&e)<<4|f>>2,g=(3&f)<<6|h,j.push(b),64!==f&&j.push(c),64!==h&&j.push(g),b=c=g="",d=e=f=h="";while(i<a.length);return j},c.restore(a,b)},e}]);
\ No newline at end of file
diff --git a/nuget/Package.nuspec b/nuget/Package.nuspec
index 70c7ee79..581dfa18 100644
--- a/nuget/Package.nuspec
+++ b/nuget/Package.nuspec
@@ -3,7 +3,7 @@
   <metadata>
     <id>angular-file-upload</id>
     <title>Angular file upload</title>
-    <version>11.2.3</version>
+    <version>12.0.0</version>
     <authors>Danial Farid, Georgios Diamantopoulos (nuget package)</authors>
     <owners>Danial Farid</owners>
     <licenseUrl>https://github.com/danialfarid/ng-file-upload/blob/master/LICENSE</licenseUrl>
diff --git a/package.json b/package.json
index bce05ad4..18e40b4b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ng-file-upload",
-  "version": "11.2.3",
+  "version": "12.0.0",
   "devDependencies": {
     "grunt": "^0.4.5",
     "grunt-contrib-concat": "^0.5.1",
diff --git a/src/data-url.js b/src/data-url.js
index b89339f3..47a02e9e 100644
--- a/src/data-url.js
+++ b/src/data-url.js
@@ -51,7 +51,20 @@
             }
             $timeout(function () {
               file.$ngfBlobUrl = url;
-              if (url) deferred.resolve(url, file);
+              if (url) {
+                deferred.resolve(url, file);
+                upload.blobUrls = upload.blobUrls || [];
+                upload.blobUrlsTotalSize = upload.blobUrlsTotalSize || 0;
+                upload.blobUrls.push({url: url, size: file.size});
+                upload.blobUrlsTotalSize += file.size || 0;
+                var maxMemory = upload.defaults.blobUrlsMaxMemory || 268435456;
+                var maxLength = upload.defaults.blobUrlsMaxQueueSize || 200;
+                while ((upload.blobUrlsTotalSize > maxMemory || upload.blobUrls.length > maxLength) && upload.blobUrls.length > 1) {
+                  var obj = upload.blobUrls.splice(0, 1)[0];
+                  URL.revokeObjectURL(obj.url);
+                  upload.blobUrlsTotalSize -= obj.size;
+                }
+              }
             });
           } else {
             var fileReader = new FileReader();
@@ -59,6 +72,9 @@
               $timeout(function () {
                 file.$ngfDataUrl = e.target.result;
                 deferred.resolve(e.target.result, file);
+                $timeout(function () {
+                  delete file.$ngfDataUrl;
+                }, 1000);
               });
             };
             fileReader.onerror = function () {
@@ -71,7 +87,7 @@
           }
         } else {
           $timeout(function () {
-            file[disallowObjectUrl ? 'dataUrl' : 'blobUrl'] = '';
+            file[disallowObjectUrl ? '$ngfDataUrl' : '$ngfBlobUrl'] = '';
             deferred.reject();
           });
         }
diff --git a/src/drop.js b/src/drop.js
index 57a67167..61b839f5 100644
--- a/src/drop.js
+++ b/src/drop.js
@@ -106,12 +106,19 @@
       if (stopPropagation(scope)) evt.stopPropagation();
       if (actualDragOverClass) elem.removeClass(actualDragOverClass);
       actualDragOverClass = null;
-      extractFiles(evt, attrGetter('ngfAllowDir', scope) !== false,
+      var items = evt.dataTransfer.items;
+      var html;
+      try {
+        html = evt.dataTransfer && evt.dataTransfer.getData && evt.dataTransfer.getData('text/html');
+      } catch (e) {/* Fix IE11 that throw error calling getData */
+      }
+
+      extractFiles(items, evt.dataTransfer.files, attrGetter('ngfAllowDir', scope) !== false,
         attrGetter('multiple') || attrGetter('ngfMultiple', scope)).then(function (files) {
         if (files.length) {
           updateModel(files, evt);
         } else {
-          extractFilesFromHtml('dropUrl', evt.dataTransfer).then(function (files) {
+          extractFilesFromHtml('dropUrl', html).then(function (files) {
             updateModel(files, evt);
           });
         }
@@ -155,12 +162,7 @@
       upload.updateModel(ngModel, attr, scope, attrGetter('ngfChange') || attrGetter('ngfDrop'), files, evt);
     }
 
-    function extractFilesFromHtml(updateOn, obj) {
-      var html;
-      try {
-        html = (obj && obj.getData && obj.getData('text/html'));
-      } catch (e) {/* Fix IE11 that throw error calling getData */
-      }
+    function extractFilesFromHtml(updateOn, html) {
       if (!upload.shouldUpdateOn(updateOn, attr, scope) || !html) return upload.rejectPromise([]);
       var urls = [];
       html.replace(/<(img src|img [^>]* src) *=\"([^\"]*)\"/gi, function (m, n, src) {
@@ -210,18 +212,19 @@
       callback(dClass);
     }
 
-    function extractFiles(evt, allowDir, multiple) {
+    function extractFiles(items, fileList, allowDir, multiple) {
       var maxFiles = upload.getValidationAttr(attr, scope, 'maxFiles') || Number.MAX_VALUE;
       var maxTotalSize = upload.getValidationAttr(attr, scope, 'maxTotalSize') || Number.MAX_VALUE;
       var includeDir = attrGetter('ngfIncludeDir', scope);
       var files = [], totalSize = 0;
+
       function traverseFileTree(entry, path) {
         var defer = $q.defer();
         if (entry != null) {
           if (entry.isDirectory) {
             var promises = [upload.emptyPromise()];
             if (includeDir) {
-              var file = {type : 'directory'};
+              var file = {type: 'directory'};
               file.name = file.path = (path || '') + entry.name + entry.name;
               files.push(file);
             }
@@ -231,7 +234,7 @@
               dirReader.readEntries(function (results) {
                 try {
                   if (!results.length) {
-                    angular.forEach(entries.slice(0), function(e) {
+                    angular.forEach(entries.slice(0), function (e) {
                       if (files.length <= maxFiles && totalSize <= maxTotalSize) {
                         promises.push(traverseFileTree(e, (path ? path : '') + entry.name + '/'));
                       }
@@ -276,7 +279,6 @@
 
       var promises = [upload.emptyPromise()];
 
-      var items = evt.dataTransfer.items;
       if (items && items.length > 0 && $location.protocol() !== 'file') {
         for (var i = 0; i < items.length; i++) {
           if (items[i].webkitGetAsEntry && items[i].webkitGetAsEntry() && items[i].webkitGetAsEntry().isDirectory) {
@@ -298,7 +300,6 @@
             (!multiple && files.length > 0)) break;
         }
       } else {
-        var fileList = evt.dataTransfer.files;
         if (fileList != null) {
           for (var j = 0; j < fileList.length; j++) {
             var file = fileList.item(j);
@@ -314,12 +315,12 @@
 
       var defer = $q.defer();
       $q.all(promises).then(function () {
-        if (!multiple) {
+        if (!multiple && !includeDir) {
           var i = 0;
-          while (files.length && files[i].type === 'directory') i++;
+          while (files[i] && files[i].type === 'directory') i++;
           defer.resolve([files[i]]);
         } else {
-            defer.resolve(files);
+          defer.resolve(files);
         }
       }, function (e) {
         defer.reject(e);
diff --git a/src/model.js b/src/model.js
index e71d3aeb..16d035cf 100644
--- a/src/model.js
+++ b/src/model.js
@@ -83,7 +83,8 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
     var param = upload.attrGetter('ngfResize', attr, scope);
     if (!param || !angular.isObject(param) || !upload.isResizeSupported() || !files.length) return upload.emptyPromise();
     var promises = [upload.emptyPromise()];
-    angular.forEach(files, function (f, i) {
+
+    function handleFile(f, i) {
       if (f.type.indexOf('image') === 0) {
         if (param.pattern && !upload.validatePattern(f, param.pattern)) return;
         var promise = upload.resize(f, param.width, param.height, param.quality,
@@ -99,43 +100,20 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           f.$errorParam = (e ? (e.message ? e.message : e) + ': ' : '') + (f && f.name);
         });
       }
-    });
-    return $q.all(promises);
-  }
+    }
 
-  function handleKeep(files, prevFiles, attr, scope) {
-    var dupFiles = [];
-    var keep = upload.attrGetter('ngfKeep', attr, scope);
-    if (keep) {
-      var hasNew = false;
-
-      if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
-        var len = prevFiles.length;
-        if (files) {
-          for (var i = 0; i < files.length; i++) {
-            for (var j = 0; j < len; j++) {
-              if (files[i].name === prevFiles[j].name) {
-                dupFiles.push(files[i]);
-                break;
-              }
-            }
-            if (j === len) {
-              prevFiles.push(files[i]);
-              hasNew = true;
-            }
-          }
-        }
-        files = prevFiles;
-      } else {
-        files = prevFiles.concat(files || []);
-      }
+    for (var i = 0; i < files.length; i++) {
+      handleFile(files[i], i);
     }
-    return {files: files, dupFiles: dupFiles, keep: keep};
+    return $q.all(promises);
   }
 
   upload.updateModel = function (ngModel, attr, scope, fileChange, files, evt, noDelay) {
     function update(files, invalidFiles, newFiles, dupFiles, isSingleModel) {
+      attr.$$ngfPrevValidFiles = files;
+      attr.$$ngfPrevInvalidFiles = invalidFiles;
       var file = files && files.length ? files[0] : null;
+      var invalidFile = invalidFiles && invalidFiles.length ? invalidFiles[0] : null;
 
       if (ngModel) {
         upload.applyModelValidation(ngModel, files);
@@ -149,6 +127,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
           $newFiles: newFiles,
           $duplicateFiles: dupFiles,
           $invalidFiles: invalidFiles,
+          $invalidFile: invalidFile,
           $event: evt
         });
       }
@@ -156,7 +135,7 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       var invalidModel = upload.attrGetter('ngfModelInvalid', attr);
       if (invalidModel) {
         $timeout(function () {
-          $parse(invalidModel).assign(scope, invalidFiles);
+          $parse(invalidModel).assign(scope, isSingleModel ? invalidFile : invalidFiles);
         });
       }
       $timeout(function () {
@@ -164,83 +143,128 @@ ngFileUpload.service('Upload', ['$parse', '$timeout', '$compile', '$q', 'UploadE
       });
     }
 
-    var newFiles = files;
-    var prevFiles = ngModel && ngModel.$modelValue && (angular.isArray(ngModel.$modelValue) ?
-        ngModel.$modelValue : [ngModel.$modelValue]);
-    prevFiles = (prevFiles || attr.$$ngfPrevFiles || []).slice(0);
-    var keepResult = handleKeep(files, prevFiles, attr, scope);
-    files = keepResult.files;
-    var dupFiles = keepResult.dupFiles;
-    var isSingleModel = !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr) && !keepResult.keep;
+    var allNewFiles, dupFiles = [], prevValidFiles, prevInvalidFiles,
+      invalids = [], valids = [];
 
-    attr.$$ngfPrevFiles = files;
+    function removeDuplicates() {
+      function equals(f1, f2) {
+        return f1.name === f2.name && (f1.$ngfOrigSize || f1.size) === (f2.$ngfOrigSize || f2.size) &&
+          f1.type === f2.type;
+      }
 
-    if (keepResult.keep && (!newFiles || !newFiles.length)) return;
+      function isInPrevFiles(f) {
+        var j;
+        for (j = 0; j < prevValidFiles.length; j++) {
+          if (equals(f, prevValidFiles[j])) {
+            return true;
+          }
+        }
+        for (j = 0; j < prevInvalidFiles.length; j++) {
+          if (equals(f, prevInvalidFiles[j])) {
+            return true;
+          }
+        }
+        return false;
+      }
 
-    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
-      $files: files,
-      $file: files && files.length ? files[0] : null,
-      $duplicateFiles: dupFiles,
-      $event: evt
-    });
+      if (files) {
+        allNewFiles = [];
+        dupFiles = [];
+        for (var i = 0; i < files.length; i++) {
+          if (isInPrevFiles(files[i])) {
+            dupFiles.push(files[i]);
+          } else {
+            allNewFiles.push(files[i]);
+          }
+        }
+      }
+    }
+
+    function toArray(v) {
+      return angular.isArray(v) ? v : [v];
+    }
 
-    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
-    var invalids = [];
     function separateInvalids() {
-      var valids = [];
-      angular.forEach(files, function (file) {
+      valids = [];
+      invalids = [];
+      angular.forEach(allNewFiles, function (file) {
         if (file.$error) {
           invalids.push(file);
         } else {
           valids.push(file);
         }
       });
-      files = valids;
     }
 
-    upload.validate(newFiles, ngModel, attr, scope).then(function () {
+    function resizeAndUpdate() {
+      function updateModel() {
+        $timeout(function () {
+          update(keep ? prevValidFiles.concat(valids) : valids,
+            keep ? prevInvalidFiles.concat(invalids) : invalids,
+            files, dupFiles, isSingleModel);
+        }, options && options.debounce ? options.debounce.change || options.debounce : 0);
+      }
+
+      resize(validateAfterResize ? allNewFiles : valids, attr, scope).then(function () {
+        if (validateAfterResize) {
+          upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
+            separateInvalids();
+            updateModel();
+          });
+        } else {
+          updateModel();
+        }
+      }, function (e) {
+        throw 'Could not resize files ' + e;
+      });
+    }
+
+    prevValidFiles = attr.$$ngfPrevValidFiles || [];
+    prevInvalidFiles = attr.$$ngfPrevInvalidFiles || [];
+    if (ngModel && ngModel.$modelValue) {
+      prevValidFiles = toArray(ngModel.$modelValue);
+    }
+
+    var keep = upload.attrGetter('ngfKeep', attr, scope);
+    allNewFiles = (files || []).slice(0);
+    if (keep === 'distinct' || upload.attrGetter('ngfKeepDistinct', attr, scope) === true) {
+      removeDuplicates(attr, scope);
+    }
+
+    var isSingleModel = !keep && !upload.attrGetter('ngfMultiple', attr, scope) && !upload.attrGetter('multiple', attr);
+
+    if (keep && !allNewFiles.length) return;
+
+    upload.attrGetter('ngfBeforeModelChange', attr, scope, {
+      $files: files,
+      $file: files && files.length ? files[0] : null,
+      $newFiles: allNewFiles,
+      $duplicateFiles: dupFiles,
+      $event: evt
+    });
+
+    var validateAfterResize = upload.attrGetter('ngfValidateAfterResize', attr, scope);
+
+    var allLength = allNewFiles.length + prevValidFiles.length + prevInvalidFiles.length;
+    var options = upload.attrGetter('ngModelOptions', attr, scope);
+    upload.validate(allNewFiles, allLength, ngModel, attr, scope).then(function () {
       if (noDelay) {
-        update(files, [], newFiles, dupFiles, isSingleModel);
+        update(allNewFiles, [], files, dupFiles, isSingleModel);
       } else {
-        var options = upload.attrGetter('ngModelOptions', attr, scope);
         if ((!options || !options.allowInvalid) && !validateAfterResize) {
           separateInvalids();
+        } else {
+          valids = allNewFiles;
         }
-        var fixOrientation = upload.emptyPromise(files);
         if (upload.attrGetter('ngfFixOrientation', attr, scope) && upload.isExifSupported()) {
-          fixOrientation = applyExifRotations(files, attr, scope);
-        }
-        fixOrientation.then(function () {
-          function updateModel() {
-            $timeout(function () {
-              update(files, invalids, newFiles, dupFiles, isSingleModel);
-            }, options && options.debounce ? options.debounce.change || options.debounce : 0);
-          }
-          resize(files, attr, scope).then(function () {
-            if (validateAfterResize) {
-              upload.validate(files, ngModel, attr, scope).then(function () {
-                separateInvalids();
-                updateModel();
-              });
-            } else {
-              updateModel();
-            }
-          }, function (e) {
-            throw 'Could not resize files ' + e;
+          applyExifRotations(valids, attr, scope).then(function () {
+            resizeAndUpdate();
           });
-        });
+        } else {
+          resizeAndUpdate();
+        }
       }
     });
-
-    // cleaning object url memories
-    var l = prevFiles.length;
-    while (l--) {
-      var prevFile = prevFiles[l];
-      if (window.URL && prevFile.blobUrl) {
-        URL.revokeObjectURL(prevFile.blobUrl);
-        delete prevFile.blobUrl;
-      }
-    }
   };
 
   return upload;
diff --git a/src/resize.js b/src/resize.js
index 38bcb9b9..cef7bbab 100644
--- a/src/resize.js
+++ b/src/resize.js
@@ -69,7 +69,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     return deferred.promise;
   };
 
-  upload.dataUrltoBlob = function (dataurl, name) {
+  upload.dataUrltoBlob = function (dataurl, name, origSize) {
     var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
       bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
     while (n--) {
@@ -77,6 +77,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
     }
     var blob = new window.Blob([u8arr], {type: mime});
     blob.name = name;
+    blob.$ngfOrigSize = origSize;
     return blob;
   };
 
@@ -112,7 +113,7 @@ ngFileUpload.service('UploadResize', ['UploadValidate', '$q', function (UploadVa
               setTimeout(function () {throw e;}, 1);
             }
           }
-          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name));
+          deferred.resolve(upload.dataUrltoBlob(dataUrl, file.name, file.size));
         }, function (r) {
           if (r === 'resizeIf') {
             deferred.resolve(file);
diff --git a/src/upload.js b/src/upload.js
index ca313642..69a513e0 100644
--- a/src/upload.js
+++ b/src/upload.js
@@ -69,7 +69,7 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
     if (!config.disableProgress) {
       config.headers.__setXHR_ = function () {
         return function (xhr) {
-          if (!xhr) return;
+          if (!xhr || !xhr.upload || !xhr.upload.addEventListener) return;
           config.__XHR = xhr;
           if (config.xhrFn) config.xhrFn(xhr);
           xhr.upload.addEventListener('progress', function (e) {
@@ -347,11 +347,11 @@ ngFileUpload.service('UploadBase', ['$http', '$q', '$timeout', function ($http,
   this.translateScalars = function (str) {
     if (angular.isString(str)) {
       if (str.search(/kb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000);
+        return parseFloat(str.substring(0, str.length - 2) * 1024);
       } else if (str.search(/mb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1048576);
       } else if (str.search(/gb/i) === str.length - 2) {
-        return parseFloat(str.substring(0, str.length - 2) * 1000000000);
+        return parseFloat(str.substring(0, str.length - 2) * 1073741824);
       } else if (str.search(/b/i) === str.length - 1) {
         return parseFloat(str.substring(0, str.length - 1));
       } else if (str.search(/s/i) === str.length - 1) {
diff --git a/src/validate.js b/src/validate.js
index 9b0dae10..02c68356 100644
--- a/src/validate.js
+++ b/src/validate.js
@@ -70,7 +70,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           if (files && !angular.isArray(files)) {
             files = [files];
           }
-          upload.validate(files, ngModel, attr, scope).then(function () {
+          upload.validate(files, files ? files.length : 0, ngModel, attr, scope).then(function () {
             upload.applyModelValidation(ngModel, files);
           });
         }
@@ -111,7 +111,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
     return val;
   };
 
-  upload.validate = function (files, ngModel, attr, scope) {
+  upload.validate = function (files, allLength, ngModel, attr, scope) {
     ngModel = ngModel || {};
     ngModel.$ngfValidations = ngModel.$ngfValidations || [];
 
@@ -139,6 +139,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
             if (val != null) {
               if (!fn(file, val)) {
                 file.$error = name;
+                (file.$errorMessages = (file.$errorMessages || {})).name = true;
                 file.$errorParam = val;
                 files.splice(i, 1);
                 valid = false;
@@ -152,16 +153,15 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
       }
     }
 
-    var filesLength = files.length;
     validateSync('maxFiles', null, function (file, val) {
-      return filesLength <= val;
+      return allLength <= val;
     });
     validateSync('pattern', null, upload.validatePattern);
     validateSync('minSize', 'size.min', function (file, val) {
-      return file.size >= upload.translateScalars(val);
+      return file.size + 0.1 >= upload.translateScalars(val);
     });
     validateSync('maxSize', 'size.max', function (file, val) {
-      return file.size <= upload.translateScalars(val);
+      return file.size - 0.1 <= upload.translateScalars(val);
     });
     var totalSize = 0;
     validateSync('maxTotalSize', null, function (file, val) {
@@ -187,6 +187,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           asyncFn(file, val).then(function (d) {
             if (!fn(d, val)) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {
@@ -195,6 +196,7 @@ ngFileUpload.service('UploadValidate', ['UploadDataUrl', '$q', '$timeout', funct
           }, function () {
             if (attrGetter('ngfValidateForce', {$file: file})) {
               file.$error = name;
+              (file.$errorMessages = (file.$errorMessages || {})).name = true;
               file.$errorParam = val;
               defer.reject();
             } else {