Every time I try to sync my iPod (8gig), it glitches, flashes white, then shows the sliver apple as it's restarting. Thing is, it won't restart until I unplug it from my computer, and enter DFU mode, wait 30 seconds, then re-re-restart it. I am jailbroken, and it's a refurbed iPod since the screen started pulling away from my original, and had to take it to an apple store for a replacement. Has this happened to anyone else? Any solutions?