I just had this happen myself over the last few days. Finally went into the application manager and cleared all data and cache, and it hasn't done it since. I was able to reopen the music player again with all my music, though I didn't play anything so I can't promise no adverse effects, but at least it stopped the messages (I don't use the music player very often, but it kept popping the message up when I would open other applications and it was annoying)