the "messages" icon on the home screen is a sort of envelope speech bubble looking yoke when there are new sms text messages you get a small green circle over this icon with the number of unread messages in it. how do you clear this? I hit the icon and get a screen of my text messages none are highlighted in bold to say what's unread AND even after opening them all and going back to the home screen the damn green circle is still there. after a while it goes again? any ideas?