Index: wp-includes/version.php
===================================================================
--- wp-includes/version.php	(revision 15530)
+++ wp-includes/version.php	(working copy)
@@ -15,7 +15,7 @@
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 15477;
+$wp_db_version = 15542;
 
 /**
  * Holds the TinyMCE version
Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 15530)
+++ wp-admin/includes/schema.php	(working copy)
@@ -82,7 +82,9 @@
   KEY comment_post_ID (comment_post_ID),
   KEY comment_approved_date_gmt (comment_approved,comment_date_gmt),
   KEY comment_date_gmt (comment_date_gmt),
-  KEY comment_parent (comment_parent)
+  KEY comment_parent (comment_parent),
+  KEY user_id (user_id),
+  KEY comment_author_email (comment_author_email)
 ) $charset_collate;
 CREATE TABLE $wpdb->links (
   link_id bigint(20) unsigned NOT NULL auto_increment,