Web-Center has released an updated version of Joomla vulnerability scanner, JoomScan 4.4.2012. More joomla vulnerabilities has been added to the newest version.
The newest version is able to find 623 Joomla vulnerabilities(The previous version identifies 611 vulnerabilities).
In joomscan you can check for new updates with command: ./joomscan.pl check or ./joomscan.pl update.