Quote from dandxg:
I too have had some major issues with Matrox drivers and stability. Thankfully, Gnome pointed me in the right direction. Finally after 3 times the universal driver for XP is stable for the last 6 months.
I never had any trouble with Matrox drivers or cards. However, the Matrox cards couldn't run my [cool] Aquarium screen saver, so I tried Quadro NVS... works just fine.