For some reason, often when I vote on a skin it will tell me I already voted. Also, it sometimes glitches out when I try to make a new skin, with the skin menu white and the back button flashing so I have to restart. Not sure of the cause since it works now.
Besides that this is a really good game. I love wasting time making a ton of character skins. Not sure if they work on Minecraft without manual editing now, but I don't own PC version so that's not really my problem. :P