Board Thread:Support Requests - Getting Technical/@comment-9927972-20131231154656/@comment-16101931-20140103050714

That script I mentioned will list all the byte-for-byte duplicates on the entire wiki. Unfortunaly images which look the same, but are not the same filesize, will not show up. But it will probably still be very useful. If you want me to help you set it up I would be happy to help. Just join the chat here at Community Central and PM me, and I'll guide you through installing that script (DupImgList, which lists all the duplicate images on your wiki).