title: Facebook comments works with URL /index.php?cID=122 but not /blog/myblogpost
body: <p>In concrete5 (PHP CMS) I created a basic Facebook comment block which works perfectly when the URL is in the form <a href="http://mysite.com/index.php?cID=122" rel="nofollow">http://mysite.com/index.php?cID=122</a>  but not when the URL is <a href="http://mysite.com/blog/myblogpost" rel="nofollow">http://mysite.com/blog/myblogpost</a> (which is the canonical URL). When using the canonical URL the facebook comments initiates, the three pulsing boxes that indicate loading appear, then the section vanished and displays nothing; there is no error. Being logged into concrete5 makes no difference.</p>
  
  <p>Adding code to include the canonical URL in the href parameter of the  section did not change this behaviour.</p>
  
  <p>I don't know if this is a Concrete5 quirk or a problem with the way I'm using the Facebook code, can anyone suggest how to resolve this?</p>
  
  <p>The block of code looks like this:</p>
  
  <pre><code>&lt;script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php" type="text/javascript"&gt;&lt;/script&gt;
  &lt;fb:comments href="http://mysite.com/blog/myblogpost"&gt;&lt;/fb:comments&gt;
  &lt;script type="text/javascript"&gt;  FB.init(MYAPIKEYHERE, "xd_receiver.htm"); &lt;/script&gt; 
  </code></pre>