In the game as the Altarans with one other hero, I got the quest to kill a troll for 200 gildar.  I killed the troll and entered the space to complete the quest and was told that they didn't have the money, so a battle started to take a ring of storms instead.  The battle was against a Hunter and a Ritualist.  I tried to click on the ritualists portrait in the initiative stack, and several pop-ups appeared, granting me a troll breastplate(and the option to equip it), the ring of storms and then leveling up both my soverign and the other hero.  After going through all of those (and it still looked like I was in the battle still), the game locked up and crashed.

I uploaded the debug.err file and the crash report (FallenEnchantress-etc) to my dropbox.  The link is attached.  If you'd like any other information, let me know.