Yes, it has some problems here and there, but they dont affect me too much (if you have win 7 64 with an ati card, im sorry).
Just wanted to say that even win7 64 and ati gfx isn't necessarily the kiss of death.
I have that setup and have decent performance (should be better with my rig though). I've had a single crash so far, unless
I alt-tab that doesn't work. My secret may actually be that I have really old drivers.
New isn't always better in the world of drivers.