Found a really cool bug in iOS 7 beta 3 where SOMETIMES when you move apps around on the screen it becomes stuck, reverts to being non editable and then the app that you were moving that caused it to becomes stuck can move anywhere on the screen!
It was quite cool. I moved it over the title bar, on top of another app. Really fluid in motion and everything. All the other apps worked perfectly too. The only thing I couldn’t do was open the actual camera app!