Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 11553)
+++ wp-admin/includes/schema.php	(working copy)
@@ -129,7 +129,7 @@
   post_modified datetime NOT NULL default '0000-00-00 00:00:00',
   post_modified_gmt datetime NOT NULL default '0000-00-00 00:00:00',
   post_content_filtered text NOT NULL,
-  post_parent bigint(20) unsigned NOT NULL default '0',
+  post_parent bigint(40) NOT NULL default '0',
   guid varchar(255) NOT NULL default '',
   menu_order int(11) NOT NULL default '0',
   post_type varchar(20) NOT NULL default 'post',

Index: wp-includes/version.php
===================================================================
--- wp-includes/version.php	(revision 11553)
+++ wp-includes/version.php	(working copy)
@@ -15,7 +15,7 @@
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 11548;
+$wp_db_version = 11549;
 
 /**
  * Holds the TinyMCE version