I have been trying to get rid of the annoying 'drawing line' when panning or rotating the view as well as trying to find a solution for the flickering shadows and choppy framerates (NOTE: I do NOT mean the jaggedness of the shadows, cause that is something we can't fix).
Note that my relevant system specs are as follows:
Intel Core 2 Quad Q9400 2.7Ghz
8GB Corsair Dominator RAM
NVidia GTX 285 1GB with latest drivers as of 24.5.2011
Windows 7 Ultimate
DirectX 11, again latest as of 24.5.