ever since I updated my iPhone 5 to iOS 6.1, my power button doesn't respond 100% of the time.Around 6 to 10 times I'm getting an unresponsive lock button. If you lock the device, unlock it, and try to lock it again, it won't react. However, if you wait a few seconds, it does react. I tested it with 3 other iPhone 5 and it's the same, so I blame it to iOS 6.1. It does happen when I'm using apps, but how I described before is a clear way to reproduce it.
Does it happen to you guys too?