Just a quick note to let you know: I have a Logitech USB optical 2-Button Wheelmouse (3-button if you include the wheel!). It used to freeze if left unused for more than about 15-20 minutes. Pointer would not move, but mouse seemed to be registering the movement (optical LED lights up).
With update 4, I have not had a freeze in 4 days. Seems they fixed some USB issues - Yipee!!
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Geoff Saulnier - Mac, *NIX, perl, hack!!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20010625173949146