title: Firefox Firebug Invalid URI. Load of media resource failed
body: <p>Getting the following in the Firebug console:</p>
  
  <pre><code>! Invalid URI. Load of media resource  failed.
  </code></pre>
  
  <p>How do I determine what is causing this error? Can't figure out what 'resource' it's talking about.</p>
  
  <p>I don't -see- anything missing on the page(s) in question.</p>
  
  <p>TIA,</p>
  
  <p>---JC</p>