--- class.tslib_fe.php	2007-12-10 21:44:36.000000000 +0100
+++ //Applications/MAMP/htdocs/typo3_src-4.0.8/typo3/sysext/cms/tslib/class.tslib_fe.php	2008-03-27 02:19:10.000000000 +0100
@@ -3705,10 +3705,12 @@
 	 */
 	function getStorageSiterootPids()	{
 		$res=array();
-		reset($this->rootLine);
-		while(list(,$rC)=each($this->rootLine))	{
-			if (!$res['_STORAGE_PID'])	$res['_STORAGE_PID']=intval($rC['storage_pid']);
-			if (!$res['_SITEROOT'])	$res['_SITEROOT']=$rC['is_siteroot']?intval($rC['uid']):0;
+		if(is_array($this->rootLine)){
+			reset($this->rootLine);
+			while(list(,$rC)=each($this->rootLine))	{
+				if (!$res['_STORAGE_PID'])	$res['_STORAGE_PID']=intval($rC['storage_pid']);
+				if (!$res['_SITEROOT'])	$res['_SITEROOT']=$rC['is_siteroot']?intval($rC['uid']):0;
+			}
 		}
 		return $res;
 	}