All I can say is since I've upgraded to iOS 5 on my iPad 2 and I've noticed a lot of my app behaving very strangely. Some just quite completely after a minute or so. One just doesn't work at all even after checking the app store for compatibility, there is nothing noted. I wish I had waited before upgraded. I recommended a friend upgrade his iPad 2 (he has a PC) and he was really P/O'd at me, as he lost a few of his apps, Although he did re-install them. I felt badly about it and will not recommend upgrading until more of the bugs and apps are working properly. IMHO.