Thread:Project:Support desk/Fatal error: Class 'LinksUpdate' not found

I get this error
 * Fatal error: Class 'LinksUpdate' not found in /web/htdocs/www.ivys.it/home/wiki/includes/Article.php on line 3322

everytime i save changes on a page, or create a new page. If i open the page created or edited after the error i see the changes.

I have mediawiki 1.16.2 on a linux server, MySQL: 5.0.91-enterprise-gpl-log Php: 5.2.17 http://www.ivys.it/wiki

Thanks!