Well I doubt it is an OpenGL prob as VW does not support OGL yet Thats for OSX support coming soon.
I used to have problems with a Voodoo3 PCI card but these were sorted with the Voodoo5 from 3DFX and latest drivers. Unfortunately 3DFX have now been swallowed by Nvidia...
But I think many of these issues will be history once teh VW fir OSX is released with decent OGL support...then it will fly...Although it is a shame VW will not support multi-processors it will be Altivec enhanced.