Today, I did a normal sync, then later on, tried to listen to music on my iPhone. Then something weird happened. The iPod said "No music available." I then went to Settings to check what happened, and oddly enough, it said 0 songs, but the storage used was the same as what it was with the music. I plugged it into iTunes, and everything looked normal, so I unsynced all the music and resynced it all back. It finally worked as it normally did again. Have any of you experienced random music deletions like this before? I find it strange that all of the songs were in the iPhone, but they couldn't be found.