Questions about Blender on Mac Pro

[piltupso]

I just got my Mac Pro Friday and was wondering if anyone has got Blender to run with a Mac Pro and the Nvidia 7300 graphics card. I downloaded Blender today from 3 different mirror sites and each time the same thing happens. Blender seems to install and run fine until the pointer passes over a neutral in one of the tool bar areas then the whole window becomes a multicolored pixelated mess and the program is useless. I can still shut down the program normally but I can't do anything with it. I have heard alot about open GL problems or drivers with some cards but am not to up to speed in this area so its a little over my head at the moment. Any help would be appreciated. Thanks