In iOS 6 whatever you where listening to would stay paused in the background indefinitely so that you could double tap the home button and press play or when connecting to a Bluetooth player (my car) it would continue where you last paused it. In iOS 7 this doesn't work any more and it's VERY annoying. It seems as though after a certain period of time the background player clears out whatever you where listening to. I really hope this was something Apple overlooked and are willing to fix. I hope it is not a new (un)feature.