title: Downgrade iOS 5.1 to iOS 5
body: <p>I'm a developer, and I have a little problem with iOS 5.1 upgrade.</p>
  
  <p>So now, I want do "downgrade" iOS 5.1. I already downloaded the iOS 5 (9A334), and try to downgrade via Xcode, dragging the file to Xcode and restoring the iPad, but it's not working.</p>
  
  <p>Any idea?</p>