Whenever I'm in the browser or another app like calendar or color note, the screen locks up and freezes if a new Yahoo mail message arrives while I'm in the screen. It seems to happen when that little pop up notification comes up at the top of the screen. I shut that off but it's still happening. Doesn't happen with texts or gmail? Anyone know why this happens? I have the yahoo mail app installed because I don't know how to configure it any other way. Not rooted FYI. Thanks.