I use Crossfired Radion HD 4670. I have the newest driver set, and it just started doing this.
I have updated to the newest graphic driver.
ScreenShot:

Everything worked fine UNTIL I bought the game. It did some sort of patch then bam! This BS started.
Comments
Update: Just tried everything else that has been given as "Fixes" for it and all have failed, Even "Safe Mode" failed.
See able size:
And basically its this mess of very random graphic changes (colors, patterns, solids).
And as I said in my first post this didn't start until after I got the Full Version, and the patch it did afterwords.
It has no strange effects in other games?
It could be a hardware or driver issue. Try running non-parallel setup, update DirectX, try a previous or newer driver.
I'm running an HD5870 with Catalyst 10.9 and Windows 7. It actually managed to fix some of the problems I had with 10.7 and previous.