=== modified file 'includes/bootstrap.inc'
--- includes/bootstrap.inc	
+++ includes/bootstrap.inc	
@@ -135,7 +135,13 @@ function conf_path() {
  * Loads the configuration and sets the base URL correctly.
  */
 function conf_init() {
-  global $db_url, $db_prefix, $base_url, $base_path, $base_root, $conf;
+  global $db_url, $db_prefix, $base_url, $base_path, $base_root;
+
+  foreach (array_keys($GLOBALS) as $key) {
+    if ($key[0] != '_') {
+      unset($GLOBALS[$key]);
+    }
+  }
 
   $conf = array();
   require_once './'. conf_path() .'/settings.php';