Index: wp-includes/comment.php
===================================================================
--- wp-includes/comment.php	(revision 55651)
+++ wp-includes/comment.php	(working copy)
@@ -2697,9 +2697,8 @@
 		$_deferred = array_unique( $_deferred );
 		foreach ( $_deferred as $i => $_post_id ) {
 			wp_update_comment_count_now( $_post_id );
-			unset( $_deferred[ $i ] );
-			/** @todo Move this outside of the foreach and reset $_deferred to an array instead */
 		}
+		$_deferred = array();
 	}
 
 	if ( wp_defer_comment_counting() ) {