On both our MBP as well as our iMac I can get OS X to crash when using a perfectly fine fragment shader, which works well under Linux. Both under Linux as well as under OS X I am using NVIDIA hardware. This is what the crash looks like:
OS X crashing when using complex GLSL shaders from Arne Schmitz on Vimeo.
Update 2010-07-13: Apple already wrote back, and requested a sample app, which I provided. Let’s see if they can figure this out. Kudos for reacting so quickly!
have you submitted a bug report to apple and nvidia?
To Apple, yes. To NVIDIA not yet. I am not sure how much of the drivers is their work, and who is actually responsible.