internet report of freeze with usb hub:

Meanwhile, MacFixIt reader Ben reports another, USB-related freeze trigger for the Mac mini:


"I've also notice random, regular lock-ups with my Mac mini. I seemed to have narrowed it down to the USB. If I have either my Canon LiDE 35 scanner or my SanDisk ImageMate 8 in 1 media reader (SDDR-88) plugged in, after a period of time (sometimes hours, sometimes days) my Mac mini will lock. Looking in the /var/log/system I see what looks like an attempt to access the USB devices followed by the inevitable hard reboot I had to perform. I'm not sure if it's the devices, but two different types of devices and two different manufacturers make me think it's something with the USB software/hardware subsystem or the Belkin Hi-Speed USB 2.0 7-Port Hub I have my USB devices plugged into."
http://www.macfixit.com/article.php?...05041107171246

this report is from a mac-mini its quite possibly a related hardware issue.