I dont see how that is copyright, but i think some members of staff just reject anything if it looks like some character they've ever seen. When i was on uploads i was once told off for accepting some heads and bodies, apparently they looked like something from some anime, just because of similar hair or face details. Stupid really.

I think the upload system could also do with space for the uploader to put extra comments. Currently when rejecting a head theres just 5 or 6 general statements to choose from so you cant actually tell the player whats wrong with it half the time.