--- typo3_src-6.2.14/typo3/sysext/backend/Classes/Tree/Pagetree/ExtdirectTreeCommands.php	2015-10-26 09:14:32.735176732 +0200
+++ typo3_src-6.2.14/typo3/sysext/backend/Classes/Tree/Pagetree/ExtdirectTreeCommands.php	2015-10-28 11:34:55.336923734 +0100
@@ -342,8 +342,10 @@
 		if (count($mountPoints) == 0) {
 			$mountPoints = array(0);
 		}
-		$mountPoints[] = (int)$GLOBALS['BE_USER']->uc['pageTree_temporaryMountPoint'];
-		$mountPoints = array_unique($mountPoints);
+		if(!is_null($GLOBALS['BE_USER']->uc['pageTree_temporaryMountPoint'])){
+			$mountPoints[] = (int)$GLOBALS['BE_USER']->uc['pageTree_temporaryMountPoint'];
+			$mountPoints = array_unique($mountPoints);
+		}
 		/** @var $userSettings \TYPO3\CMS\Backend\User\ExtDirect\BackendUserSettingsDataProvider */
 		$userSettings = GeneralUtility::makeInstance('TYPO3\\CMS\\Backend\\User\\ExtDirect\\BackendUserSettingsDataProvider');
 		$state = $userSettings->get('BackendComponents.States.' . $stateId);