title: Is moving to Lion a prerequisite for moving to XCode 4.1 (from the app store)?
body: <p>should you only download XCode 4.1 from the app store if you move to Lion?  </p>
  
  <p>i.e I am staying on Leopard for a few more weeks, so do I have to stay with XCode 4.0.2 until I move to Lion?</p>