Sounds like a defective graphics card to me.. have your reseller replace the card with different card.. might try booting in VGA mode to prove the point.. however that is an ugly way to work ..
updating to a newer graphics driver might work my guess is the card.
neil wrote:
guesses...
> 1) I have had some mysterious crashes that cleared up with a newer graphics > driver
> 2) since you upgraded some of your option settings have changed
> 3) move up to sp 3.1 or sp4