Index: /Users/denis/Sites/sem-pro/wp-admin/includes/plugin.php
===================================================================
--- /Users/denis/Sites/sem-pro/wp-admin/includes/plugin.php	(revision 972)
+++ /Users/denis/Sites/sem-pro/wp-admin/includes/plugin.php	(working copy)
@@ -553,7 +553,9 @@
 
 	if ( empty($icon_url) )
 		$icon_url = 'images/generic.png';
-
+	
+	$menu[] = array( '', $access_level, '', '', 'wp-menu-separator' );
+	
 	$menu[] = array ( $menu_title, $access_level, $file, $page_title, 'menu-top ' . $hookname, $hookname, $icon_url );
 
 	return $hookname;