Non-image files (e.g. pdf) are sometimes uploaded to the image gallery (to become a file gallery later). The image gallery tries to show a thumbnail of the files, which leads to a broken picture for non-image files, while the browser will download the originally uploaded. This sometimes leads to large downloads when only viewing the gallery.

Submitted by Elmer van Chastelet on 29 July 2015 at 11:27

As a fix for non-image files, the gallery now only shows the file name and content type, without downloading the file. Also, it doesn’t make internal ‘thumbnail’ copies for non-image files anymore, which were 1:1 copies of the original.