Index: t3lib/class.t3lib_extfilefunc.php
===================================================================
--- t3lib/class.t3lib_extfilefunc.php	(revision 4037)
+++ t3lib/class.t3lib_extfilefunc.php	(working copy)
@@ -696,7 +696,7 @@
 		if (!$this->isInit) return FALSE;
 
 		$theFolder = $this->cleanFileName($cmds['data']);
-		if ($theFolder)	{
+		if (isset($theFolder))	{
 			if ($this->checkFileNameLen($theFolder))	{
 				$theTarget = $this->is_directory($cmds['target']);	// Check the target dir
 				if ($theTarget)	{
Index: t3lib/class.t3lib_div.php
===================================================================
--- t3lib/class.t3lib_div.php	(revision 4037)
+++ t3lib/class.t3lib_div.php	(working copy)
@@ -2847,7 +2847,7 @@
 		if ($path)	{
 			$d = @dir($path);
 			if (is_object($d))	{
-				while($entry=$d->read()) {
+				while(false !== ($entry=$d->read())) {
 					if (@is_dir($path.'/'.$entry) && $entry!= '..' && $entry!= '.')	{
 						$filearray[]=$entry;
 					}
@@ -5167,4 +5167,4 @@
 	}
 }
 
-?>
\ No newline at end of file
+?>
Index: typo3/class.file_list.inc
===================================================================
--- typo3/class.file_list.inc	(revision 4037)
+++ typo3/class.file_list.inc	(working copy)
@@ -564,7 +564,7 @@
 			$d = @dir($path);
 			$tempArray=Array();
 			if (is_object($d))	{
-				while($entry=$d->read()) {
+				while(false !== ($entry=$d->read())) {
 					if ($entry!='.' && $entry!='..')	{
 						$wholePath = $path.'/'.$entry;		// Because of odd PHP-error where  <br />-tag is sometimes placed after a filename!!
 						if (@file_exists($wholePath) && (!$type || t3lib_div::inList($type,filetype($wholePath))))	{