title: Win8 - Unhandled exception in Windows.UI.Xaml.dll
body: <p>I've got some strange behavior while debugging/running my metro app.
  During drag'n'drop the screen will be refreshed. I'd added some functionality to block binded properties from refreshing while drag'n'drop is in progress.</p>
  
  <p>But sometimes the app crash, but in stead of throwing some exception which I can debug, all I got is an window saying to open an external just-in-time-debugger</p>
  
  <blockquote>
    <p>An unhandled win32 exception occurred in SOME_APP.exe [7785].</p>
  </blockquote>
  
  <p>(The external debugger does not bring more information)</p>
  
  <p>And the output says:</p>
  
  <blockquote>
    <p>Unhandled exception at 0x05017145 (Windows.UI.Xaml.dll) in SOME_APP.exe: 0xC0000005: Access violation reading location 0x00000088.</p>
  </blockquote>
  
  <p>I'm working on a x64 device.
  Has somebody ever heard of such problem?</p>