Index: wp-includes/default-filters.php
===================================================================
--- wp-includes/default-filters.php	(revision 21535)
+++ wp-includes/default-filters.php	(working copy)
@@ -249,7 +249,6 @@
 add_action( 'shutdown',                   'wp_ob_end_flush_all',                      1    );
 add_action( 'pre_post_update',            'wp_save_post_revision'                          );
 add_action( 'publish_post',               '_publish_post_hook',                       5, 1 );
-add_action( 'save_post',                  '_save_post_hook',                          5, 2 );
 add_action( 'transition_post_status',     '_transition_post_status',                  5, 3 );
 add_action( 'transition_post_status',     '_update_term_count_on_transition_post_status', 10, 3 );
 add_action( 'comment_form',               'wp_comment_form_unfiltered_html_nonce'          );
Index: wp-includes/post.php
===================================================================
--- wp-includes/post.php	(revision 21535)
+++ wp-includes/post.php	(working copy)
@@ -2100,11 +2100,6 @@
 
 	clean_post_cache( $post );
 
-	if ( is_post_type_hierarchical( $post->post_type ) ) {
-		foreach ( (array) $children as $child )
-			clean_post_cache( $child );
-	}
-
 	wp_clear_scheduled_hook('publish_future_post', array( $postid ) );
 
 	do_action('after_delete_post', $postid);
@@ -2772,32 +2767,16 @@
  * Publish a post by transitioning the post status.
  *
  * @since 2.1.0
- * @uses $wpdb
- * @uses do_action() Calls 'edit_post', 'save_post', and 'wp_insert_post' on post_id and post data.
+ * @uses wp_update_post()
  *
- * @param int $post_id Post ID.
+ * @param int|object $post Post ID or Post object.
  * @return null
  */
-function wp_publish_post($post_id) {
-	global $wpdb;
-
-	$post = get_post($post_id);
-
-	if ( empty($post) )
-		return;
-
-	if ( 'publish' == $post->post_status )
+function wp_publish_post($post) {
+	$post = get_post( $post );
+	if ( empty( $post ) )
 		return;
-
-	$wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post_id ) );
-
-	$old_status = $post->post_status;
-	$post->post_status = 'publish';
-	wp_transition_post_status('publish', $old_status, $post);
-
-	do_action('edit_post', $post_id, $post);
-	do_action('save_post', $post_id, $post);
-	do_action('wp_insert_post', $post_id, $post);
+	wp_update_post( array( 'ID' => $post->ID, 'post_status' => 'publish' ) );
 }
 
 /**
@@ -4408,7 +4387,7 @@
 		do_action( 'clean_page_cache', $post->ID );
 	}
 
-	if ( $children = $wpdb->get_results( $wpdb->prepare("SELECT ID, post_type FROM $wpdb->posts WHERE post_parent = %d", $post->ID) ) ) {
+	if ( $children = $wpdb->get_results( $wpdb->prepare("SELECT ID, post_type FROM $wpdb->posts WHERE post_parent = %d AND post_type <> 'revision' ", $post->ID) ) ) {
 		foreach ( $children as $child ) {
 			// Loop detection
 			if ( $child->ID == $post->ID )
@@ -4615,19 +4594,6 @@
 }
 
 /**
- * Hook used to prevent page/post cache from staying dirty when a post is saved.
- *
- * @since 2.3.0
- * @access private
- *
- * @param int $post_id The ID in the database table for the $post
- * @param object $post Object type containing the post information
- */
-function _save_post_hook( $post_id, $post ) {
-	clean_post_cache( $post );
-}
-
-/**
  * Retrieve post ancestors and append to post ancestors property.
  *
  * Will only retrieve ancestors once, if property is already set, then nothing