title: Property with 'iboutlet' attribute must be an object type (invalid 'BOOL' (aka 'signed char'))
body: <p>After updating my project to 10.7 SDK and switching debugger,
  I got this message:</p>
  
  <pre><code>Property with 'iboutlet' attribute must be an object type (invalid 'BOOL' (aka 'signed char'))
  </code></pre>
  
  <p>It was perfectly working before the update.
  Any hint on how to fix that?</p>