Fix.

sebastianbergmann · sebastianbergmann · commit bbaab467a67b · 2012-01-18T12:47:14.000+01:00
diff --git a/File/Iterator/Facade.php b/File/Iterator/Facade.php
@@ -156,6 +156,6 @@ protected function getCommonPath(array $files)
             $j++;
         }
 
-        return $common;
+        return DIRECTORY_SEPARATOR . $common;
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -156,6 +156,6 @@ protected function getCommonPath(array $files)`
`156`	`156`	`$j++;`
`157`	`157`	`}`
`158`	`158`
`159`		`- return $common;`
	`159`	`+ return DIRECTORY_SEPARATOR . $common;`
`160`	`160`	`}`
`161`	`161`	`}`