I've had an ipod photo since they came out and unortunately had to set it up on a pc, but it would always work fine on both the pc and mac. Today when itunes opens a i get a message that says "itunes cannot read the contents of the ipod. use the ipod software updater application to restore the ipod to factory settings." I updated the ipod on my pc about a week ago and it still worked fine on both pc and mac, but today i've tried it on numerous macs and i get the same message. I'm afraid that if i restore it to factory settings i'll lose all my music. Any suggestions?