My iPod touch 3G was on 3.1.2 and jailbroken. I downloaded a 4.0 firmware ipsw file and shift clicked the restore button in iTunes and it "restored" to 4.0. It synced my apps (including the ones I had deleted long ago) but it didn't sync any of my music, videos, or photos. Now it says it can't read the contents, duplicate files were specified, etc. PLEASE does anyone know how to solve this problem? Thank you.