I have a iPhone 4 (32GB) running 4.0.2 and over the past week or two I have noticed that whatever music I have currently paused on my phone will just start to play. In fact it just happened again now. The iPhone was just sitting on my desk next to me in sleep mode and the music just suddenly started to play on it. It happened a few days ago as well when I was walking around a store with the phone in the side holster I have. I have tried rebooting the phone (even a hard reboot). Is there some app that might be causing this? Very strange. There is a thread on the Macworld forums about it but it isn't very active which is why I decided to post here about it as well.