It took me a while to figure out what was causing it, but I finally figured out that if I disconnected my iPod Touch while my PC was in standby mode, I would get the blue screen of death. I'm running Windows Vista and don't know if it would happen with other versions of Windows. Frankly, I don't want to explore the theory. The solution, obviously, is to only disconnect the Touch when the PC is either running or off. Never had this issue with any other USB device. Nice, Apple.