title: Joomla blank screen after moving servers
body: <p>I moved a Joomla installation from one server to another. Copied the database and all files. When I moved it into place it all loaded, everything worked fine and after a period of time (like 20 minutes) it now just loads a blank page.</p>
  
  <p>I've traced through the Joomla framework, if I put an echo in before the call to <code>$app-&gt;render()</code> it works fine and outputs, but the call to <code>$app-&gt;render()</code> never enters. I.e. I put an echo statement at the top of render() and it was not output. Very bizare, no errors, no output.</p>
  
  <p>Any ideas? Joomla 1.7.3.</p>
  
  <p>EDIT: I just timed it, it worked up until 30 minutes exactly. At this point I get two lines in PHP error_log - </p>
  
  <pre><code>[22-Mar-2012 01:35:46 UTC] PHP Notice:  Undefined offset: 2 in /home/off/public_html/components/com_k2/router.php on line 114
  [22-Mar-2012 01:35:46 UTC] PHP Notice:  Undefined variable: text in /home/off/public_html/templates/gk_boutique/error.php on line 27
  </code></pre>