I can confirm the muted SMS/Email tones after unplugging the headphones. Receiving SMS after unplugging only causes the phone to vibrate and sound a little beep, the same I would hear if I still had the headphones plugged in. If I pause the media player before unplugging, the SMS/Email tones work as they should. Otherwise great app, it has saved me from many embarrasing situations when I accidentially unplug the headphones. But this problem forces me to remember to manually pause the player when I finish listening..