In one of the newbie quests, you find a Cobold in a dungeon, and she asks you to rescue her son from the pygmy village. You're supposed to kill the guards and take the key to the cell, unlock it, and tell the prisoner he's free. I did the quests, killed the guards, and they had no key. But the door to the cobold prisoner's cell was already open. I told him he was free, and he just walked out.
I never know with this game. It's so "real", at the time I thought maybe the guard had just gotten careless!
But I thought I should post anyway, in case it really is a bug.