Have the same error. Tried replacing the Enderman files and deleting them. That does not work and you can not enter a world if the files are missing. start of the error for me is ---- Minecraft Crash Report ----
// You're mean.
java.lang.IllegalAccessError: tried to access method net.minecraft.entity.monster.EntityEnderman.func_70821_d(Lnet/minecraft/entity/player/EntityPlayer;)Z from class net.mobtalker.mobtalker2.entity.ai.MobTalkerAiEndermanTarget
Fixed the problem for the 0.6.0 version. download the file, install it into your mods. launch mine craft with the forge profile on. go to mods then to mob talker 2 and click on general and disable Enderman. I will try to fix the problem for the other releases, but to do so i need to configure the files manually because the in game configure does not work for the other versions.