Index: t3lib/class.t3lib_div.php
===================================================================
--- t3lib/class.t3lib_div.php	(revision 10435)
+++ t3lib/class.t3lib_div.php	(working copy)
@@ -5985,6 +5985,10 @@
 			$cmdLine = $path.' '.implode(' ', $paramsArr);
 		}
 
+		if (TYPO3_OS == 'WIN' && version_compare(phpversion(), '5.3.0', '<')) {
+			$cmdLine = '"' . $cmdLine . '"';
+		}
+		
 		return $cmdLine;
 	}