Starting about two weeks ago my IPT is constantly freezing when I turn it on and try to open an application. At times it will open (say the calendar) incredibly slowly and then freezes, at other times it completely freezes. I'm then required to restart the IPT. My IPT is not jailbroken so that isn't the problem. I tried doing a restore and that hasn't fixed the problem. Is there anything I can do about this or do I need to take it to Apple? Thanks.