You think ATI has Vista issues? NVidia is the King of issues with Vista at the moment. It has taken NVidia 5 driver releases to fix problems with DirectShow. One of thier drivers would crash Internet Explorer if IE had to fork off a Windows Media Player to play something.
Right now, neither of them are perfect, but ATI is actually ahead of NVidia in the Vista driver department.
Granted, I do not hang around with *extreme* gamers. I prefer talking to engineers as they usually have more on the ball than any end user does.
NVidia is still playing catch up with ATI in the area of stable Vista drivers.
As far as AMD goes, they are still a long way behind Intel in the performance market. And the original Phenom was a disaster. A nasty bug in the first gen parts caused all types of performance issues. It hurt AMD badly. AMD's best bet is to find a niche market and try to dominate it. They are too far behind in the performance market now to catch Intel.
If Intel wants to own a market, they usually will, if not through product, they can do it through the sheer amount of cash they can throw at something. And thier stock went down due to them completely missing the guess as to what thier revenues would be. Even with the slump they managed to pick up more marketshare.
If you think that slump in sales hurt Intel, wait until you see AMD's numbers. I hope AMD can hang in there, but they are fooling themselves if they think they can go toe-to-toe with Intel.