Index: typo3/sysext/cms/tslib/class.tslib_fe.php
===================================================================
--- typo3/sysext/cms/tslib/class.tslib_fe.php	(revision 3521)
+++ typo3/sysext/cms/tslib/class.tslib_fe.php	(working copy)
@@ -4205,6 +4205,11 @@
 	 */
 	function getStorageSiterootPids()	{
 		$res=array();
+
+		if(!is_array($this->rootLine)) {
+			return array();
+		}
+
 		reset($this->rootLine);
 		while(list(,$rC)=each($this->rootLine))	{
 			if (!$res['_STORAGE_PID'])	$res['_STORAGE_PID']=intval($rC['storage_pid']);