Just got a new 40 GB, 4th Gen iPod. It's been working great up until today. I'm at work, and tried to mount the iPod with a friends cable, and its not wokring. When I went into disc utility, it showed the iPod, but said it had a bunch of errors on the drive. Wierd thing is, it was working fine this morning, at home using my cable. His cable is working, because his iPod mounts using it. Any ideas?