http://pastebin.com/xv403SfS

This happens when I added Version 3.11 Of RFTools

Which adds a its own villager now.

You need to change either AgriCraft's or RFTools's villager id in the config files.

Yeah, I am terrible I should not submit an issue when I am tired. I changed the ID, however my issue post did not reflect that.

I probably should do something to make it assign the villager to a free id dynamically, but for now changing or disabling the id of the villager in the config should indeed fix it.