Thumbnail for image with jpeg extension not take into account

[jerrywham]

If extension for image is jpeg and not jpg, thumbnail is not display.
To fix this issue, you have to change the regex line 272 in index.php

if (preg_match("/.jpg$|.gif$|.png$/i", $file)) {
(...)

to

if (preg_match("/.jpe?g$|.gif$|.png$/i", $file)) {
(...)