same problem here…
EDIT:
here is a nasty fix:
change in version.php (/wp-includes/version.php):
$wp_version = '2.6.1';
in
$wp_version = '2.6.1';
$version = $wp_version;
then in your footer.php:
<?php echo $GLOBALS['version']; ?>
This is just a temporary fix. When you update your blog, you should always repeat step one…