I've just finished clearing Raedric's Keep, and the quest appears to be impossible to complete. I choose to kill Raedric, and after the fight, there was no cutscene with Kolsc, and the quest is not updating. The entire keep has been cleared, Nedmar's friend rescued, etc etc, but the quest is stuck and still says I need to confront Lord Raedric. Is there any way to fix this issue?

People are talking about this here: http://forums.obsidian.net/topic/72528-raedric-quest-lord-of-barren-land-trigger-not-working

I was able to get the event to trigger by restarting Steam and loading up a save from right before the battle.