Since downloading 3.1, I've experienced intermittent (a few times a day) problems with the touchscreen. What happens is: when I'm on any screen that can scroll up and down and I place my finger on the screen, the page/screen begins to shimmy up and down, eventually registering random "button" pushes and opening menus, messages, clicking on licks, etc. After a hard reset, it goes away for a while. It's happening in Safari, Messages, Mail, Photos, Facebook, Tweetie, TweetDeck, iCab Mobile, and pretty much every app that scrolls.
Is this happening to anyone else? This is irritating as all hell.