title: Checksum Validation Failed when submitting with Xcode 5
body: <p>I was submitting an app to the iOS App Store a few days ago, and got this message from Xcode. Before I had time to resubmit it, Apple has already started reviewing my app. Is this something I need to worry about?</p>
  
  <p><img src="https://i.stack.imgur.com/q2i00.jpg" alt="enter image description here"></p>
  
  <p>Edit: The app was accepted a few days later.</p>