I have a new iPad 2 WiFi-only. It's about 48 hours out-of-the-box. Twice now the rotate feature has stopped working. The lock rotation is not enabled. The only way to get the rotation to work is to turn the whole unit off and then on again. Apps will just freeze. IBooks is a big one that does this all the time when browsing the book store. Other apps, both iPad-sized and iPhone-sized apps, will just crash. This is annoying.