title: Facebook open graph not being read correctly
body: <p>I have a facebook like button and facebook meta tags on a page. I changed the og:description tag but dont see the change when I click on the Like button on my page. It is picking up the old description. In order to force facebook to scrape my page , I go to <a href="https://developers.facebook.com/tools/debug" rel="nofollow">https://developers.facebook.com/tools/debug</a> and enter the URL again. It shows the updated decription there. But not when I am liking it. Is there any parameter that I need to pass to force a scrape seperately ? </p>
  
  <p>Help appreciated !</p>
  
  <pre><code>&lt;meta property="og:title" content="Some Title" /&gt;
  &lt;meta property="og:type" content="activity" /&gt;
  &lt;meta property="og:url" content="Some url" /&gt;
  &lt;meta property="og:image" content="http://www.cruises.com/images/ship_ext/norwegian_34/34_444_d_Jewel_150.jpg" /&gt;
  &lt;meta property="og:site_name" content="Cruises.com" /&gt;
  &lt;meta property="og:description" content="Hey, I found this wonderful cruise to Alaska !" /&gt;
  &lt;meta property="fb:admins" content="682339085" /&gt;
  </code></pre>
  
  <p>These are the tags that I am using.</p>