title: PHP header("Refresh") problems
body: <p>I have some code like:</p>
  
  <pre><code>header('Refresh: 15; url=' . $url);
  </code></pre>
  
  <p>This works fine, except when people are visiting this url via Twitter (posted from a Hootesuite client).  Apparently, in all browsers <em>other</em> than IE this works properly.  With IE, from the Hootesuite link, this does not refresh properly; a direct link does.</p>
  
  <p>Why?</p>