--- typo3_src-4.3.3/t3lib/class.t3lib_div_orginal.php	2010-04-27 15:54:15.000000000 +0200
+++ typo3_src-4.3.3/t3lib/class.t3lib_div.php	2010-04-27 16:01:36.000000000 +0200
@@ -278,8 +278,8 @@
 	 * @return	array		Returns the GET vars merged recursively onto the POST vars.
 	 */
 	public static function _GPmerged($parameter) {
-		$postParameter = is_array($_POST[$parameter]) ? $_POST[$parameter] : array();
-		$getParameter  = is_array($_GET[$parameter])  ? $_GET[$parameter]  : array();
+		$postParameter = (isset($_POST[$parameter]) and is_array($_POST[$parameter])) ? $_POST[$parameter] : array();
+		$getParameter  = (isset($_POST[$parameter]) and is_array($_GET[$parameter]))  ? $_GET[$parameter]  : array();
 
 		$mergedParameters = self::array_merge_recursive_overrule($getParameter, $postParameter);
 		self::stripSlashesOnArray($mergedParameters);