Since I replaced my 3GS with a 4S (and iOS 7) stopping and restarting music/audiobooks/podcasts doesn't work any more.
Basically, instead of pressing the button on the headphone microphone once to continue playing what I was listening to earlier, I now have to log into the phone, select one of two audio players and there press play to continue playing.
Have I configured something wrong or did I just lose that feature?