However, the flickering that I saw did occur on both a 5900Ultra and an All-In-Wonder Radeon 9800Pro.
Damnit, I'm starting to think you and Nvidia have seen some DIFFERENT kind of flicker issue that appears on both cards, not the 5900 alone, and the wrong problem will be fixed. If that happens, I'm going to grin and bear it and get a 9800 again, and kiss old game compatibility goodbye.
Hey Nvidia, if you think you fixed the problem, load Etherlords, play a Duel in the Red Desert level, and move the mouse up and down while looking at the sky!!!