Just downloaded XCode 4.5 and iOS 6.0, and already experiencing some troubles after compiling my app. I'm using the simulator. First, ADBannerView is not firing anymore when there isn't an Internet connection. Specifically, didFailToReceiveAdWithError is not being called. This can be used to hide your banner if it's not needed. Secondly, I'm playing some sound effects using OpenAL, and maybe after 5 minutes or so, all of my sounds start to become corrupt. They sound like their being crunched to death. Really horrible. And already posted a thread on getting some unexpected behavior from sizeToFit. This is all on the iOS 6.0 simulator. No problems on iOS 5.0. Just wondering if anybody is experiencing the same problems.