title: Magento: Page won't stop loading in admin/system_config/edit/section/design
body: <p>I was using Magento 1.4.1 and upgrade gracefully to 1.4.2. After testing if the upgrade was Ok, I made some modification in order to have a new home page layout for a store using these <a href="http://magentoexpert.blogspot.com/2010/01/magento-add-new-cms-page-layout.html" rel="nofollow">instruction</a>. The modifications have been tested on a local version (Ubuntu 10.04, php 5.3.2), and worked great.</p>
  
  <p>When I upload the files to the pre-prod server (Centos 5.5, php 5.2.14), and access the <code>System-&gt;Configuration-&gt;design</code> tab in the admin backend, my browser seems to keep loading indefinitly.</p>
  
  <p><strong>What I have done</strong>:</p>
  
  <ul>
  <li>I copied the <code>app/code/core/Mage/Page/*</code> directory to the <code>app/code/local/Mage/Page/</code>;</li>
  <li>I created the app/etc/modules/Mage_Page.xml, and defined the codePool to local;</li>
  </ul>
  
  <p><strong>What I have already checked</strong>:</p>
  
  <ul>
  <li>I got no errors in <code>/var/log/httpd/*.log</code>;</li>
  <li>I got no errors in magento's <code>var/log/system.log</code>;</li>
  <li>The frontend works fine;</li>
  <li>The backend can be accessed, except the <code>System-&gt;Configuration-&gt;design</code> tab;</li>
  <li>I tried to revert my modifications to a revision before the modification were made (using svn);</li>
  <li>I cleaned up the cache using <code>rm -fr var/cache/mage* var/session/*</code> directly on the server;</li>
  <li>I restarted the server multiple time;</li>
  <li>I even tried to get a dump of the db in production on the preprod server, with no effect. I still got the same issue.</li>
  </ul>
  
  <p>If someone could point out anything I could have forgot.
  I am ready to try anything to make it work, since it would not affect the production server for now. </p>