A bug I've stumbled upon today: in the cellar of the selune temple where Halsin is being held in a cage (in bear shape), I joined the goblins at throwing stones at him. He then attacked, and the gobiln children immediately ran to get the guards (good litte goblin children!). When said guards arrived, they were hostile both to me AND to all the other goblins and wargs that were on my side, as I was fighting the bear (Halsin). Then 'my' goblins killed the enemy goblins and he fight ended.