title: Upgraded WP7 app to WP8. The thread 0xb6c has exited with code 259 (0x103)
body: <p>After upgrading our WP7 app to WP8, the app stops working (as in just halts and none of the ui elements work) almost immediately after the splash screen. </p>
  
  <p>The only output seems to be this: 'The thread 0xb6c has exited with code 259 (0x103).'.</p>
  
  <p>How do I go about debugging this problem? The app works perfectly on WP7.</p>
  
  <p>Thanks.</p>