title: Google+ snippet thumbnail not showing
body: <p>i have in google+ snippet in my website, to sharing my website on google+, my code look like this</p>
  
  <pre><code>&lt;head&gt;
  &lt;meta property="og:title" content="title of website" /&gt;
  &lt;meta property="og:url" content="my website url" /&gt;
  &lt;meta property="og:image" content="url image" /&gt;
  &lt;meta property="og:description" content="description of my website" /&gt; 
  &lt;/head&gt;
  
  &lt;bod&gt;
  &lt;script type="text/javascript" src="https://apis.google.com/js/plusone.js"&gt;&lt;/script&gt;
  &lt;g:plusone size="tall"&gt;&lt;/g:plusone&gt;&lt;/td&gt;
  &lt;/body&gt;
  </code></pre>
  
  <p>i have also included facebook like, which rendering all meta tags (title,image,description). But, in case of google+, thumbnail image is not showing.</p>
  
  <p>Need help !!</p>