title: set_include_path not include Zend framework
body: <p>I have this statement:</p>
  
  <pre><code>set_include_path('/sites/intranet/includes/Zend' . PATH_SEPARATOR . get_include_path());
  </code></pre>
  
  <p>but when I try to use the Acl library it seems that is not able to find the file;</p>
  
  <pre><code>require_once 'Zend/Acl/Resource/Interface.php';
  </code></pre>
  
  <p>The path is really included in the path, I have printed it. Any idea?</p>