MMF2 with Windows 7 / Java with MacOSX

I installed MMF2/build 248 on Windows 7
and it is running smooth.

I also build a java game and run smoothly on Mac OSX 10.5.6

I did have some glitches but I suspect it is because of the Virtual Machine? (For example, "Standard" mode runs "jumpy", but switching to DirectX runs smooth)

Anyone has installed MMF2 on Windows7?
How about your Java game experience on Mac OSX?

I'd absolutely love to use Windows 7, but it turns out it wont recognize my GeForce 7900gs and install the drivers properly, so I'm screwed =(