Defacement not detected?

See: http://killmalware.com/mandalaschool.nl/
See: http://quttera.com/detailed_report/mandalaschool.nl
Joomla CMS outdated. WARNING
Google finds the site to be potentially dangerous,
but nothing here: http://www.unmaskparasites.com/security-report/
Compromised sites will often be linked to malicious javascript in an attempt to attack users of your Joomla installation.
widget page hack - defacement seems cleansed!

polonus