I just encountered a problem I've never had before. I was syncing my iPhone and adding a few new ringtones (I used this technique to create them and it has been working fine for several syncs before this one http://www.youtube.com/watch?v=PAUA1QYOgGY ) When my sync was done, all my music was gone (about 5.5 gigs worth). The music is still in iTunes and my computer, but nowhere to be found on the iPhone. I tried rebooting both the phone and the computer and also unchecking and rechecking all the music on iTunes. nothing. the phone syncs normally, but just never adds the music back. All the music had played just fine for the last several months. Am I missing some simple thing here? I'm already on my second iPhone now (the first one went down with battery probs) and I really hate to think it has to be replaced again. I searched the forums for anyone with a similar problem but couldn't find anyone who had suffered a loss of all music like this. Please if there are any iPhoners with any ideas as to a solution, I'm waiting, without any music.