iTunes Playlist Disappearing Songs

[Macaddict16]

I recently upgraded to iTunes 10.5 and just purchased an iPhone 4S. I also upgraded my iPad 1 to iOS 5. On my iPad I have playlists that have the correct songs in them. When I went to sync my new iPhone I found that the playlists on my computer were EMPTY! The music is still on the iPad, but the playlists on the computer is empty. Its not all of them, but about half of them. Any ideas what went wrong and how to fix it? I have a lot of playlists and this is kinda freakin me out.
Thanks!
Robert

 

[Macaddict16]

The only thing I can think up to do is use the fact that the playlists are still on my iPad and manually re-add the song to the playlists. The weird thing is they are all still on the computer, just not in the playlists. Any other ideas that would take less time?
Thanks!
Macaddict16

 

[Macaddict16]

This sounds similar to what trouble I am having. I have created about a dozen different running playlists and only one of them has any songs left in it!

https://discussions.apple.com/thread/2671008?start=0&tstart=0