Chapter two; East Road; Jax's Tavern (that one where you can find the archeologists) - After defeating the troll chieftain I was supposed to return its head to Lenton, who's inside that Tavern. The problem is that he simply DOES NOT STOP slashing a war-dummy that lies close to him; so... no matter how much time I wait or try to take any action, I can't talk to him and, then, complete the quest. Please, help me to "fix" this.

I had the same prob.. Its OK - so you miss out on a few exp. points and some cash, no big deal and not part of the major story line.