After updating to iOS 5 I've noticed a consistent problem with the iPhone 4 camera. Even when focus is right on the money, the camera pumps once through the full focus range for every shot. This adds about 3 seconds to the time between shots and before the first shot (you can take a photo during the focus pump but obviously it's not going to be in focus). I don't know what I'm supposed to do during that time, maybe "get coffee". During video recording the focus works as well as it used to aside from the first "pump".