diff --git a/wp-includes/classes.php b/wp-includes/classes.php
index 5c2580c42e..b49a20d7bb 100644
--- a/wp-includes/classes.php
+++ b/wp-includes/classes.php
@@ -822,6 +822,8 @@ class Walker {
 		$id_field = $this->db_fields['id'];
 
 		//display this element
+		if ( ! empty( $args[0] ) )
+			$args[0]['has_children'] = ! empty( $children_elements[$element->$id_field] );
 		$cb_args = array_merge( array(&$output, $element, $depth), $args);
 		call_user_func_array(array(&$this, 'start_el'), $cb_args);
 
diff --git a/wp-includes/comment-template.php b/wp-includes/comment-template.php
index 1e2e4a27b8..f5b3a4a589 100644
--- a/wp-includes/comment-template.php
+++ b/wp-includes/comment-template.php
@@ -1168,7 +1168,7 @@ class Walker_Comment extends Walker {
 			$add_below = 'div-comment';
 		}
 ?>
-		<<?php echo $tag ?> <?php comment_class() ?> id="comment-<?php comment_ID() ?>">
+		<<?php echo $tag ?> <?php comment_class(empty( $args['has_children'] ) ? '' : 'parent') ?> id="comment-<?php comment_ID() ?>">
 		<?php if ( 'ul' == $args['style'] ) : ?>
 		<div id="div-comment-<?php comment_ID() ?>">
 		<?php endif; ?>
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 580ed7ac06..422702064e 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -41,7 +41,7 @@ function wp_default_scripts( &$scripts ) {
 	$scripts->base_url = $guessurl;
 	$scripts->default_version = get_bloginfo( 'version' );
 
-	$scripts->add( 'common', '/wp-admin/js/common.js', array('jquery', 'hoverIntent'), '20081118' );
+	$scripts->add( 'common', '/wp-admin/js/common.js', array('jquery', 'hoverIntent'), '20081120' );
 	$scripts->add( 'sack', '/wp-includes/js/tw-sack.js', false, '1.6.1' );
 
 	$scripts->add( 'quicktags', '/wp-includes/js/quicktags.js', false, '20081103' );