1.83 GhZ Intel Mac mini crashes after Frontrow

Put your thinking caps on for this one...
My new Mac mini (purchased immediately before the new 2.0 mini release) is experiencing regular black screen feeezes / hangs / crashes with the "please reboot the computer" message on various languages.
I can make it hang by watching a few minutes of a video from iTunes or by playing a DVD.
as son as i exit frontrow it shows the decktop, i can move the mouse for 1 second, then the hard reboot message.
I have a large itunes library with the actual files on a networked NAS connected to over SMB and i have a wirelesa logitech VX revolution mouse and standard wired apple keyboard and an Airport Extreme that the mac mini is wired to.
I have run tests from the hardware cd/DVD that came with it and even replaced the 512 that came with it butno luck so I went back to the original ram. I have only had the box for a month from Mac Mall.
THANK YOU FOR YOUR HELP

Was the Logitech mouse driver I was using - had installed the one from the CD with the mouse (Vx nano). When I downloaded the newest from Logitech.com it stopped the issues. Sounds a lot like a Vista problem, but that was it!

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