Please help. When I tap on 'like' or the profiles of friends on Facebook, nothing happens. I've been unable to post comments as well. This non-responsiveness only seems to happen on FB. I have an iPad 2 64G. It also shuts down to the home page constantly. I have rebooted numerous times. Maybe it's time for a new one? I use it everyday for work and pleasure. I can't imagine being w/o it.