title: After Upgrading from Xcode 4.2 to Xcode 4.3, instruments command line fails
body: <p>After upgrading from Xcode 4.2 to Xcode 4.3, the <code>instruments</code> command line tool fails with the following error:</p>
  
  <blockquote>
    <p>Error: No developer directory found at /Developer. Run
    /usr/bin/xcode-select to update the developer directory path.</p>
  </blockquote>