title: Xcode Build Problem (MinimumOSVersion value is invalid)
body: <p>When I build app with Xcode 3.2.3 (iPhone SDK 4), following image was showed in Build Log</p>
  
  <blockquote>
    <p>Info.plist: MinimumOSVersion value is
    invalid.  It must be a valid version: 
    (-19024)</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/igQz2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/igQz2.png" alt="alt text"></a>
  </p>
  
  <p><a href="https://i.stack.imgur.com/92Y1Z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/92Y1Z.png" alt="alt text"></a>
  </p>
  
  <p><a href="https://i.stack.imgur.com/iTWTV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iTWTV.png" alt="alt text"></a>
  </p>