While I don't have a picture I can describe one that I wanted to know about.
I first found the umd around 05 and 06 and I remember here and maybe on the old yahoo groups too a dark haired girl in pigtails (i think) getting slimed. The picture was of her head only and the slime was thick.
I know how vague this is, but it has been eons since I last saw it. I know it's likely from a site that doesn't make content anymore.