Discogs don't allow people to link directly to their images, so when people add an image such as http://s.pixogs.com/image/A-2787250-1340855287-8021.jpeg as an image or logo, it doesn't work and we just end up having to vote no or entering another edit to remove it, so it would be better if we could just prevent them from being entered in the first place.

Another URL format they use is http://s.discogss.com/image/L-150-50750-1130243720.gif