^ And THAT'S why Apple is actively pursuing Psystar.

The instant somebody gets one of these and sees similar instability problems that they used to see in Windows, and Apple's shiny image gets reduced. Apple's software is polished and fast because they control the hardware it runs on and can optimize and use shortcuts that they couldn't use (or would take much longer to evaluate and code) if they had to support the full base of hardware that the other OSes do. It's certainly a nice deal for them and allows them to push speed and stability, but they need to hold that image to keep making their hardware sales.