Sounds like I am not the only one having problems. Yesterday morning the Nano was fine, synced with laptop etc. Yesterday evening it would charge but comes up with USB device not recognised or faulty on the PC. I have tried the reset, disk mode etc with no success. However, it is charging OK. I have tried 3 computers, my daughter's Nano etc and am convinced that it is not the cable or the PC. Question: I tried to restore factory default setting but nothing seemed to happen, it did not wipe the songs as I had expected. The Ipod still works OK, plays songs etc, but will not talk to a PC. My local Apple service centre tells me the USB connector is faulty but only because the Ipod was not recognised. I think there could be more to this than that simple answer.