Simon proudly shows off his Minecraft single player world with the Mo' Creatures mod... but he seems to have forgotten to update to the latest version. [The latest version of YogBox contains the fixed version!]
Download Mo' Creatures: http://www.minecraftforum.net/topic/81771-v166-mo-creatures-v2103-with-even-fewer-bunnies/
Dammit... the url...
