Anyone else have issues with this? I upgraded two phones, a 3GS and a 4. The 3GS upgraded the OS, but wiped out my music and apps. Took 5 hours to rebuild/get the OS to finally install without an error. When I upgraded the 4, it wiped the OS, then the computer played the "do not recognize USB device" game. Reinstalled iTunes and the device driver to no avail. Eventually solved my problem by disconnecting the keyboard because I perceived some sort of USB device conflict happening. Did everyone else fare well?