Bought IPAD 2 yesterday at BestBuy. Messing around this morning and managed to freeze up Safari. I managed to unstick it by holding down the onoff button and sliding the red slide that appeared. Is this a common occurance - the freezing up? Don't want to have to constantly reboot or whatever. Anybody have an idea what I did to cause this. I have used pc's for years, but don't have any idea how tablets really work and don't want to mess it up! Thanks.