I can not get iTunes music to sync to my iPhone 3G. I have iTunes 8.2.1 and firmware 3.0 on my iPhone. Leopard 10.5.6. I have tried a number of things: - Uninstalling & re-installing iTunes - Resetting iSync data - Deleting and re-importing my iTunes library - Automatic music syncing as well as "Manually manage music and videos" (drag and drop) - Various music selections (in other words, it's not failing on a particular song/music track or playlist) - Restoring my iPhone (with & without restoring the backup) - Syncing the iPhone on another computer (it syncs fine over there so I think I've ruled out that the issue is the iPhone) The symptoms are this: I can sync apps & video to the iPhone with no issues. But when I try to sync music, it runs through the process ("syncing x of y") but when it gets to the end, it results in "An unknown error occurred (13001)" error from iTunes. On the Summary screen in iTunes, I see the music taking up space but when I look on the iPhone, it shows no music content (apps & video are there). If I try the "manually manage music & videos" option, I can drag 2 songs to the iPhone but when I try to do a third, I get the same 13001 error. There's obviously something that happens at the end of the iTunes music sync that (for lack of a better description) writes the file/music directory. That's where it fails. I've searched for solutions for a couple of days. I can't seem to find anything. Please help!!!???