is your computer a dell notebook? Ive heard this once before on a dell xps notebook, and it happens to me too on my dell e1705 notebook. Works fine on bro's computer. I bought a widock, it syncs the ipod thru wifi instead of usb, slower transfer, but its my work around since I don't want to shell out for a new computer. Not sure if it will fix the problem as i haven't got the widock in the mail yet. Its made for last gen ipods but those docks are universal. On a side note, my 5.5 gen ipod with video had problems with my notebook. It would sync itself then suddenly eject itself when done. It wouldn't stay in the list of connected devices and I couldn't sync it again manually by clicking "sync" in itunes. My only way to resolve this was by enabling hard disk use, I had to turn it on before it was done syncing, cuz u can only enable it while the the device is present. It worked for keeping it from ejecting itself when 80gig video ipod was done sncing. Sadly, Hard disk use is disabled on the new ipods. I believe the problem we and the other guy with an xps are experiencing is caused by insufficent power provided by the usb slots. I think my laptop is cutting off the power due to an internal power saving scheme, that I am unable to correct. If u dont have a laptop, I recommend making sure its plugged directly into your computer, not a usb port of your connected keyboard. Also try multiple usb ports on your computer, not just one and disconnect all other devices running from usb (i.e.. printers keyboard and mouse (if usb), game controllers. I think the case is insufficent usb power . Reinstalling itunes couldn't hurt your cause.