Aha, my one xbox follower. I see you are having troubles.
I have to admit, this has never happened to me before...
You say you're stuck behind the door, as Hanharr instead of the Exile?
My guess is that there's a script not firing... but why it's not firing is beyond me. You may have had a conveniently placed scratch which ruined that area when you Qwixed it...
It's always a good idea to play through the game with the files on your harddrive first before making a final burn disc. You never know what could have gone wrong.
Just to be on the safe side though, could you tell me the exact contents of your override folder? It may help in troubleshooting the problem.