i know this has been asked many many times, but i assure you i've turned off all notifications on the factory messaging app. it only happens when i receive a mms message. sms is fine. every time i get a mms message, i get a dual notification from handcent. it doesn't happen when i use gosms or the factory app... only handcent. it used to do this on my old mytouch 4g also, but i figured it was an issue with my phone. now it's doing it on my new one s too. any ideas?