title: invalid HTTP response code ‘0’
body: <p>I am trying to make use of a script that uses <a href="http://cpaint.sourceforge.net/" rel="nofollow noreferrer">CPAINT</a> and I keep getting the error above when I click on favourite an item (a 5 star rating system).</p>
  
  <p>It looks like it is making an AJAX request but I can not see this from my Firebug to debug this - why is this the case?</p>
  
  <p>More importantly what does the error code 0 mean?</p>
  
  <p>Thank you all for any help</p>