Texture messed when changing avatar

I have radeon 9000 pro with catalyst 3.2 drivers on a ak72 with amd athlon 800.

When I mess with my avatar (works fine, but got a freeze onces) texture become messed up.
When I'm zoomed out on a object the texture sometimes becomes very colourfull (like random colors)
Also some ground and other stuff seem to change to random-color-textures and back to normal when I walk or zoom on it

Also my hair becomes partly invisible and I don't see all the object the right way anymore (hard to describe). Restarting second life fixes it (not really that annoying, because it starts really fast)

Oh and also when I change the texture details in the preferences I got visual errors (sometimes the same, sometimes others)

I have to say that my videocard get's really hot and one time I got a sudden reboot and I could almost burn my hands on the videocard. But still the texture error doesn't seem to cause that. It also happens when the card is stil cold. (I'm going to buy a fan tomorrow)

But does anybody know this problem, or a possible solution?

3.2 drivers are buggy. Get 3.1. Dunno what to tell ya bout yer card overheating though.. jus, yeah, get a fan and attach it over the old one, heh.