Index: wp-includes/version.php
===================================================================
--- wp-includes/version.php	(revision 12249)
+++ wp-includes/version.php	(working copy)
@@ -15,7 +15,7 @@
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 12217;
+$wp_db_version = 12249;
 
 /**
  * Holds the TinyMCE version
Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 12249)
+++ wp-admin/includes/schema.php	(working copy)
@@ -82,6 +82,7 @@
   PRIMARY KEY  (comment_ID),
   KEY comment_approved (comment_approved),
   KEY comment_post_ID (comment_post_ID),
+  KEY comment_user_ID (user_id),
   KEY comment_approved_date_gmt (comment_approved,comment_date_gmt),
   KEY comment_date_gmt (comment_date_gmt)
 ) $charset_collate;
@@ -148,7 +149,8 @@
   PRIMARY KEY  (ID),
   KEY post_name (post_name),
   KEY type_status_date (post_type,post_status,post_date,ID),
-  KEY post_parent (post_parent)
+  KEY post_parent (post_parent),
+  KEY post_author (post_author)
 ) $charset_collate;
 CREATE TABLE $wpdb->users (
   ID bigint(20) unsigned NOT NULL auto_increment,