http://i403.photobucket.com/albums/pp116/setari666/Oblivion2011-07-1412-36-04-85.png
I have the Unofficial Oblivion Patch installed along with the Supplement thing too (UOPS? I dunno.) And figured this might be cause of that. I also cannot leave the room for some reason... otherwise I wouldn't care.
Edit: Yep... definitely a problem with the patch for Thieves Den. :\ Anyone know a fix for that patch? (Hah, the irony.)