I wanted to ask something as it's driving me crazy. Since being on the iOS 7 beta (the day before b2 came out) my sleep button started acting weird. Too often it doesn't react when I press the sleep button, so I can't lock it or turn it off. Now it's happening almost all of the time. Has anyone else had this issue? Is this related to the iOS 7 beta software or is it my hardware button which needs repair? PS: It's an iPhone 5.