The touch screen on my hero suddenly started exhibiting strange behavior today. It doesn't register taps at the edges of the screen (left, right, top, bottom) but still registers swipes. These regions are quite large, making the buttons on the outside rows of the keyboard unusable. the middle of the screen is still fine for taps and swipes. Anyone else experienced this? I've tried rebooting and removing the battery with no improvement. I've had my hero for about eight months, and it has been perfect until today with no apparent physical cause for this problem, i.e., the phone has not been damaged (cracked, dented, etc) in any way.