I resized the image to 1024X768. Pic was taken at 1280X1024.
After installing Mysteries of the Sith I experienced exactly the same sort of ghosting/corruption in the image.
Maybe it's the Catalyst drivers? Either that or there could be some sort of tweak I could try in ATI Tray Tools. I've already tried disabling some Tiling options in Ati Trays advanced tweaking options but seeing as I don't know if this will help the situation it's sort of a stab in the dark..