I have an iPhone 4 on iOS 4.2 GM, and it is a little buggy and sluggish to 4.1..after upgrading my camera and photos app haven't worked and keep crashing. When on the keyboard you push the numbers key, there's about a 1-2 second lag, and it gets sooo annoying, and when you push down on a app or folder to move it takes forever for it to wiggle! What can I do?