Ya I have a ati 6950 and just tried it, I had some gfx glitches where the skybox background is poping through trees and other objects so I put shadow complexity on low and it fixed it. Not a big deal or anything but im glad there working on fixing it because it looks so much better with AA on.
scratch that It has to do with the bloom option as soon as I turned it off it fixed it even with shadows still on high.