There is game breaking bug which is in the house of horror mission. Basically what happens is you kill this guy and go down and talk to the altar, however when coming back up the game is bugged with the door being locked. I negated this by simply reverting to an earlier auto save and simply killing the guy and walking out. Problem with that is the hue on the game is completely messed up indefinitely as you can see by the video by the hue. This wouldn't be such a big problem if the difference is game time wasn't 6 hours from my last save! I had completed all of the dark brotherhood missions and now my game is broken; please help.

I created a youtube video so you can better understand what Im dealing with
http://www.youtube.com/watch?v=jcjnglN8pUo