Typical from dr 5 to 6 : Object of class stdClass could not be converted to string

This is typical when porting a theme from drupal 5 to drupal 6

the $language variable will give you:
Object of class stdClass could not be converted to string in /srv/www/vhosts/drupal_6x/sites/www.bedandbreakfastsavoia.it/themes/leaf/page.tpl.php on line 3

till you replace that with $language->language