Index: wp-includes/nav-menu-template.php
===================================================================
--- wp-includes/nav-menu-template.php	(revision 15490)
+++ wp-includes/nav-menu-template.php	(working copy)
@@ -228,9 +228,12 @@
 
 	if ( $show_container )
 		$nav_menu .= '</' . $args->container . '>';
-
+		
+	$nav_menu = str_replace( Array("\n","\r","\t"), "", $nav_menu);
 	$nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );
 
+	
+	
 	if ( $args->echo )
 		echo $nav_menu;
 	else