title: what may cause a Page Not Found error in flatpages?
body: <p>I just setup django's flatpages app following <a href="http://docs.djangoproject.com/en/dev/ref/contrib/flatpages/" rel="nofollow noreferrer">http://docs.djangoproject.com/en/dev/ref/contrib/flatpages/</a></p>
  
  <p>Everything is fine, but when i link to a flatpage, i always get: </p>
  
  <pre><code>Page not found (404)
  Request Method:     GET
  Request URL:    http://example.com/about/
  
  [..]
  
  The current URL, about/, didn't match any of these.
  </code></pre>
  
  <p>what is that about? what may cause this error?</p>
  
  <p>thanks in advance...</p>