The game isn't loading, stuck in an infinite loop. I had a similar problem when rescuing the one treasure hunter in the imp cave. TO get around it I just chatted with him real fast.
Try to reinstall the game and the patches. If it continues, submit your saved game to Larian and move on in the game until they get back to you. Then return and defeate Stone.
Which battle is this? The first battle in the dungeon or the 2nd battle in the arena?
