I started a new game and it is also messed up. I also reinstalled and have the same problem. Something I noticed though is that turning on soft shadows temporarily fixed the problem then when I went into a new area it got messed up again so I turned the soft shadows off and that fixed it again. I kept switching that thing on and off thinking I could just try to play like that but then I got to the outdoors are on Korriban and wether the soft shadows are on or not it doesn't matter it's all screwed up looking. Maybe I need to update the drivers on my X800PRO...