Invalid Argument

The Facebook Connect cross-domain receiver URL (http://static.ak.fbcdn.net/connect/xd_proxy.php#?=&cb=f229cbc9aa1c474&origin=file%3A%2F%2F%2Ff19ec7fec849fde&relation=parent&transport=postmessage&frame=f91692ce816c54&result=xxRESULTTOKENxx) must have the application's Connect URL (http://www.engadget.com/) as a prefix. You can configure the Connect URL in the Application Settings Editor.