root/branches/2.6/wp-includes/version.php

<?php
/**
 * This holds the version number in a separate file so we can bump it without cluttering the SVN
 */

/**
 * The WordPress version string
 *
 * @global string $wp_version
 */
$wp_version = '2.6.3';

/**
 * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
 *
 * @global int $wp_db_version
 */
$wp_db_version = 8204;

$wpmu_version = '2.6.3';
?>