Thread:CMONYALL/@comment-5709722-20130613142022/@comment-5709722-20130613152409

something about cache refresh for pages and images:

http://community.wikia.com/wiki/Help:Purge

nothing of those worked for me for the category image previews

i don't know the minimum real size yet, but it is bigger than 50x50, check this

http://paradiseislandhd.wikia.com/wiki/File:Springboard.png, the 82 × 49 image had no thumbnail, while the new 150 × 90 was immediately generated and cached. It is the same image with a manually added broader border.