I used this iPod (new) previously on my husbands PC. I recently purchased a refurbished iBook G4 and it works great with the exception of not recognizing my iPod! When I plug it in, it give me the error message: Disc Insertion - The disc you inserted was not readable by this computer. What does this mean? It has been a while since I've used a mac. I've tried restarting my iPod both off and on the mac with no change. I'm worried I'll lose all my music. Have also tried repairing and verifying with no results.