diff --git a/application/config/migration.php b/application/config/migration.php
index 667f4bc7..e6f9d5b5 100644
--- a/application/config/migration.php
+++ b/application/config/migration.php
@@ -21,10 +21,11 @@
 | be upgraded / downgraded to.
 |
 */
-$config['migration_version'] = 20140228091723;
+// Format for migration_type = unmark: (YYYYMMDDXX format where XX is an incremented sequence of changes in selected day)
+$config['migration_version'] = 2014022801;
 
 // Set migration type to timestamp to avoid conflicts
-$config['migration_type']    = 'timestamp';
+$config['migration_type']    = 'unmark';
 
 
 /*
@@ -39,6 +40,16 @@
 */
 $config['migration_path'] = APPPATH . 'migrations/';
 
+/*
+ * Due to switch from timestamp to unmark numbering (to support 32-bit systems), we need to add mappings
+ * for already created migration files, to port on 64-bit systems properly
+ * If you've created custom migrations, please add entries to this config in form of
+ * old number (timestamp) => new number (YYYYMMDDXX format where XX is an incremented sequence of changes in selected day)
+ */
+$config['migration_mappings'] = array(
+	'20140228091723' => '2014022801',
+);
+
 
 /* End of file migration.php */
 /* Location: ./application/config/migration.php */
\ No newline at end of file
diff --git a/application/libraries/Plain_Migration.php b/application/libraries/Plain_Migration.php
index e04c7bf7..bd321d86 100644
--- a/application/libraries/Plain_Migration.php
+++ b/application/libraries/Plain_Migration.php
@@ -21,11 +21,87 @@ public function __construct($config = array())
         // Set the latest release
         if (! empty($config)) {
             $config['migration_version'] = (isset($custom_config['migration_version']) && $custom_config['migration_version'] > $config['migration_version']) ? $custom_config['migration_version'] : $config['migration_version'];
+            if(empty($config['migration_mappings'])){
+                $config['migration_mappings'] = array();
+            }
+            if(!empty($custom_config['migration_mappings'])){
+                $config['migration_mappings'] = $config['migration_mappings'] + $custom_config['migration_mappings'];
+            }
         }
 
-        // Call home
+        // Overriden parent constructor to support YYYYMMDDXX format where XX is sequential number in day
+        if (get_parent_class($this) !== FALSE && get_class($this) !== config_item('subclass_prefix').'Migration' )
+        {
+            return;
+        }
+        
+        foreach ($config as $key => $val)
+        {
+            $this->{'_'.$key} = $val;
+        }
+        
+        log_message('debug', 'Migrations class initialized');
+        
+        // Are they trying to use migrations while it is disabled?
+        if ($this->_migration_enabled !== TRUE)
+        {
+            show_error('Migrations has been loaded but is disabled or set up incorrectly.');
+        }
+        
+        // If not set, set it
+        $this->_migration_path !== '' OR $this->_migration_path = APPPATH.'migrations/';
+        
+        // Add trailing slash if not set
+        $this->_migration_path = rtrim($this->_migration_path, '/').'/';
+        
+        // Load migration language
+        $this->lang->load('migration');
+        
+        // They'll probably be using dbforge
+        $this->load->dbforge();
+        
+        // Make sure the migration table name was set.
+        if (empty($this->_migration_table))
+        {
+            show_error('Migrations configuration file (migration.php) must have "migration_table" set.');
+        }
+        
+        // Migration basename regex
+        switch($this->_migration_type){
+        	case 'timestamp':
+        	    $this->_migration_regex = '/^\d{14}_(\w+)$/';
+        	    break;
+        	case 'unmark':
+        	    $this->_migration_regex = '/^\d{10}_(\w+)$/';
+        	    break;
+        	default:
+        	    $this->_migration_regex = '/^\d{3}_(\w+)$/';
+        }     
+        
+        // Make sure a valid migration numbering type was set.
+        if ( ! in_array($this->_migration_type, array('sequential', 'timestamp', 'unmark')))
+        {
+            show_error('An invalid migration numbering type was specified: '.$this->_migration_type);
+        }
+        
+        // If the migrations table is missing, make it
+        if ( ! $this->db->table_exists($this->_migration_table))
+        {
+            $this->dbforge->add_field(array(
+                'version' => array('type' => 'BIGINT', 'constraint' => 20),
+            ));
+        
+            $this->dbforge->create_table($this->_migration_table, TRUE);
+        
+            $this->db->insert($this->_migration_table, array('version' => 0));
+        }
+        
+        // Do we auto migrate to the latest migration?
+        if ($this->_migration_auto_latest === TRUE && ! $this->latest())
+        {
+            show_error($this->error_string());
+        }
         // Check that all tables are InnoDB
-        parent::__construct($config);
         self::checkForInnoDB();
     }
 
@@ -96,6 +172,30 @@ public function version($target_version)
         }
         return $migrationsResult;
     }
+    
+    /**
+     * Retrieves current schema version
+     * If _migration_type == 'unmark' and previous version matches timestamp - return different version
+     *
+     * @return	int	Current Migration
+     */
+    protected function _get_version()
+    {
+        $row = $this->db->select('version')->get($this->_migration_table)->row();
+        $finalVersion = $row ? $row->version : 0;
+        // Check if we're not switching from timestamp to unmark
+        if($finalVersion != 0 && $this->_migration_type === 'unmark' && strlen((string) $finalVersion)  == 14){
+            // Switch from timestamp to unmark
+            if(!empty($this->_migration_mappings) && !empty($this->_migration_mappings[$finalVersion])){
+                log_message('debug', sprintf('Returning mapped %s instead of original %s migration version and updating DB', $this->_migration_mappings[$finalVersion] , $finalVersion));
+                $finalVersion = $this->_migration_mappings[$finalVersion];
+                $this->_update_version($finalVersion);
+            } else{
+                show_error(sprintf(_('Migrations switched from timestamp to unmark, but cannot find mapping for version %s. Please add correct version to migrations_mapping config entry for migrations'), $finalVersion));
+            }
+        }
+        return $finalVersion;
+    }
 
     /**
      * Creates database backup and returns a path to a file with this backup
diff --git a/application/migrations/20140228091723_label_sort.php b/application/migrations/2014022801_label_sort.php
similarity index 100%
rename from application/migrations/20140228091723_label_sort.php
rename to application/migrations/2014022801_label_sort.php