Same thing started today on my wife's iPhone 4 that she's had less than a month...Have tried all of the "genius" bar suggestions...Update, restart, restore, remove, replace, blah, blah...No luck. I'm a big Mac supporter but I can't stand when this happens from time to time with their new products that obviously have hardware defects and it takes them FOREVER to even acknowledge it, much less deal with it. Apple, GET THIS FIXED!!!!!