[Lucifer]

what version of the zune syncing software are you running? I might have an Idea, something similar was happening with my 30. the problems first arose when I ran the initial cd version of the software, pre 1.4 firmware.. and it actually worked pretty good but videos synched real slowly and music sometimes didn't sync for some error code most likely the same one, but I can't remember... anyway after the software updates to the latest version with the 2.3 firmware, all my music has synced (if not automatically, at least after dragging files / folders onto the software's music page) without any errors... so what version of the zune software do you use? (obviously if you can wirelessly sync, then you're using a zune 2 software and I don't know but at least try dragging your music files one at a time onto the music page of the zune 2 sync software.