if someone need help to debug, i have a PMAC G5 + ATI 9800 ready
It is only a problem in 16bit modes (24bit modes are fine)
We've tried but could not repro this on a 9800 in a Peg2 (so obviously with original PC firmware). I'm afraid there isn't much to be done here without physical access to the card.
if I can be useful with ROM 9800 file flashed used or other, please tell me
At the moment I'll use the Mac original 9600 card