I just got a Radeon 9600XT and now my terrain textures on Hoth: Echo Base are black. I took a screen shot and opened it in PSP and selected all the black area and then did negative colors and they looked normal.
Not all the terrain is black at one time though. Seems like it depends on how far away the texture is from where Im standing. I've linked to two screen shots that have the black textures in them so you can see what im talking about.
If anyone has ever seen this before or knows how to fix it, any help is appreciated.