I'm on the iPhone 4 and I'm getting all sorts of problems, and I didn't restore from a back up. The messages app is buggy to all he'll and unstable to the max, confused at placing the bubbles, in animations and otherwise, like when I pull up the keyboard or even just the app, I find myself force quitting it a lot. The problem gets much worse when I turn on character count. Also, the keyboard is having trouble recognizing the space bar sometimes, and sometimes just skips over keys I pressed. Also, waking it from sleep takes forever sometimes, up to 5 seconds, and sometimes more than one push. Also there is an annoying lag after typing in my passcode. Also, but I might just be imagining this one, my battery fauns much faster if I have orientation lock on. Also, unlike 3.0, it doesn't let me curse anymore, I'm back to saying "shot" and "duck". And everything just feels... Umpolised, not apple stable, there are little tiny problems everywhere that didn't exist in 3.1.3, witch was the most stable since 1.1.4. Apple, please fix these problems, it's like 2.0 all over again.