I'm fairly happy with my PowerBook but I noticed some odd problems. The biggest being with shaders. In Halo, Age of Empires 3, and several other games I can't enable high level shaders, and in KOTOR, anything but High textures are locked out. Doom 3 wont run on anything but low either, it just resets, and I can't enable shadows, same with Prey and Quake 4. Any idea? I thought Mac's used OpenGL so there was no stupid shader version bs or any complications like that. My OS is 10.5.7 so its the most recent.