Could someone tell me what the flashing home button means? Sometime when I turn off the screen the center button begins to flash every few seconds, while other times it remains off. The only reason I care is because when I let it flash it kills my battery life and a few times drained it completely. The only way I know to stop it for flashing is to turn the screen back on then off and check to make sure it is not flashing. Is there a way to keep it off when I turn off the screen?