Ticket #15961: 15961.patch

wp-admin/includes/class-wp-comments-list-table.php

@@ -108 +108 @@
                 foreach ( $_comments as $_c ) {
                         $_comment_post_ids[] = $_c->comment_post_ID;
                 }
+                $_comment_post_ids = array_unique( $_comment_post_ids );
 
                 $this->pending_count = get_pending_comments_num( $_comment_post_ids );