Several. Am I the only one?
I had it happen several times this week. I spent about 10 hours on Monday trying to figure out what was happening. Three times I connected and my music was gone.
I also had a problem syncing 158 music videos purchased in iTunes. Putting a check mark in the box labeled since music videos only synced some of them. I created a playlist for those videos to sync and only a few would sync with that. I then selected both options to sync the videos and this time all 158 synced but then I had two copies of the videos.
I finally fixed the music video problem by selecting manually manage music and videos and dragging the music video playlist to my phone. All 158 videos synced. I then set the phone to automatically sync and the videos stayed.
5.0.1 has lots of bugs....or is it iTunes?