I have been having a problem with my iPhone since I upgrade to 1.1.1. I have a 45 minute playlist I use sometimes when I go to sleep. What happens is that when I wake up, the battery is drained as if the phone has been playing all night and the Usage shows 7 hours more Usage time than when I went to bed. I check the "Last Played" column in iTunes after syncing the phone and the last music played was at the right time, about 45 minutes after I started my playlist. I have tried rebooting the phone and resetting my usage data, and that worked for one night, but now the problem is back. I have also reproduced the problem with playing just one 4 minute song after resetting the Usage Stats, and when I wake the phone up 20 minutes later, it shows 20 minutes of usage, even though the song ended after 4 minutes. All of these tests have been done with airplane mode enabled. Has anyone else had a similar problem or have any advise? Thanks in advance.