I have this error;
Fatal error: Call to undefined method User::getEditToken() in /var/www/lighttpd/vhosts/www.liblfds.org/mediawiki/extensions/UserMerge/UserMerge_body.php on line 148
PHP 5.3.17 (cli) (built: Sep 17 2012 20:19:13) Product Version MediaWiki 1.18.2 PHP 5.3.17 (cgi-fcgi) PostgreSQL 9.2.1