After updating my iPad 1 and my iPhone 4 to IOS 5 last week, I didn't have any trouble syncing my devices over wifi. I still don't have trouble with my iPhone. However, yesterday my iPad suddenly wouldn't sync. It goes through the first six steps and then hangs up on this step (Waiting for changes to be applied). It doesn't matter if I originate the sync from my iPad (plugged in) or from iTunes on my PC. Before yesterday, it was working.