The game was running all nice and smooth, until I decided to mess with some of the graphical settings. I turned my refresh rate up to 75, then it got just a wee bit slow, so I turned it down to 70 and also turned up the anti-aliasing to 8X at the same time. When I applied this newest change the game did its thing, but when the screen popped back up it is now showing only in the upper left hand corner of my screen (the part of the game that is showing is the lower right). I've restarted the game a few times and it's still stuck that way. I can't access the options to change the settings back or anything. Currently unplayable.
DxDiag:
http://pastebin.com/m56b62210