I have a radeon hd4890, i have to turn off reflections and gl shadows for mine to run correctly, you can try this, but i doubt it will be the solution for your card. it seems s3d and ati dont ever mix well right off.
can you run it on safest settings? if so then it is indeed a simple setting tweak your looking for.
try contacting gavin directly, he will be able to help you more then anyone around.
edit* woops my bad, i need sleep before i type lol, thanks for the heads up
Thanks for sticking with us and for the gentle reminder.
Considering that there was nothing wrong with your messages, I
feel quite certain that Kangabunny meant to say directly instead of
“correctly.” If so, I second his suggestion. You can send a PM to Gavin
from the main page. Click on the green Global Moderators link.
try contacting gavin correctly, he will be able to help you more then anyone around.
Version 42.X works great on my 2005 XP machine but 43 does not.
In light of failing to solve my problem, I shan’t try to solve yours.