Index: typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_pagetree.php
===================================================================
--- typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_pagetree.php	(Revision 9643)
+++ typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_pagetree.php	(Arbeitskopie)
@@ -523,8 +523,8 @@
 	}
 }
 
-if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.t3lib_tree_dataprovider_pagetree.php']) {
-	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.t3lib_tree_dataprovider_pagetree.php']);
+if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.t3lib_tree_dataprovider_pagetree.php'])) {
+	include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.t3lib_tree_dataprovider_pagetree.php']);
 }
 
 ?>
Index: typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_abstracttree.php
===================================================================
--- typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_abstracttree.php	(Revision 9643)
+++ typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_abstracttree.php	(Arbeitskopie)
@@ -217,8 +217,8 @@
 	abstract public function getContextMenuConfiguration();
 }
 
-if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_abstracttree.php']) {
-	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_abstracttree.php']);
+if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_abstracttree.php'])) {
+	include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/extdirect/dataprovider/class.tx_pagetree_dataprovider_abstracttree.php']);
 }
 
 ?>
\ No newline at end of file
Index: typo3/sysext/pagetree/classes/class.tx_pagetree_abstracttree.php
===================================================================
--- typo3/sysext/pagetree/classes/class.tx_pagetree_abstracttree.php	(Revision 9643)
+++ typo3/sysext/pagetree/classes/class.tx_pagetree_abstracttree.php	(Arbeitskopie)
@@ -246,8 +246,8 @@
 }
 
 
-if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_abstracttree.php'])	{
-	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_abstracttree.php']);
+if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_abstracttree.php'])) {
+	include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_abstracttree.php']);
 }
 
 ?>
\ No newline at end of file
Index: typo3/sysext/pagetree/classes/class.tx_contextmenu_contextmenu.php
===================================================================
--- typo3/sysext/pagetree/classes/class.tx_contextmenu_contextmenu.php	(Revision 9643)
+++ typo3/sysext/pagetree/classes/class.tx_contextmenu_contextmenu.php	(Arbeitskopie)
@@ -59,8 +59,8 @@
 	}
 }
 
-if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/contextmenu/classes/tx_contextmenu_contextmenu.php'])	{
-	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/contextmenu/classes/tx_contextmenu_contextmenu.php']);
+if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/contextmenu/classes/tx_contextmenu_contextmenu.php'])) {
+	include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/contextmenu/classes/tx_contextmenu_contextmenu.php']);
 }
 
 ?>
Index: typo3/sysext/pagetree/classes/class.tx_pagetree_pagetree.php
===================================================================
--- typo3/sysext/pagetree/classes/class.tx_pagetree_pagetree.php	(Revision 9643)
+++ typo3/sysext/pagetree/classes/class.tx_pagetree_pagetree.php	(Arbeitskopie)
@@ -626,8 +626,8 @@
 	}
 }
 
-if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_pagetree.php'])	{
-	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_pagetree.php']);
+if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_pagetree.php'])) {
+	include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/pagetree/classes/class.tx_pagetree_pagetree.php']);
 }
 
 ?>
\ No newline at end of file