title: Django: any use of blocktrans causes TemplateSyntaxError
body: <p>Using Django 1.2.1, any use of blocktrans breaks my template. Eg</p>
  
  <pre><code>{%blocktrans%}text{%endblocktrans%}
  </code></pre>
  
  <p>Results in:</p>
  
  <p>Django Version: 1.2.1
  Exception Type: TemplateSyntaxError
  Invalid block tag: 'blocktrans'</p>
  
  <p>Removing the blacktrans causes the code to work. Django s running on GAE if that's relevant.</p>