vm version 2.0.4
/administrator/components/com_virtuemart/models/user.php, line ~748:
$plg_datas = $dispatcher->trigger('plgVmOnUserStore', $data);
must be:
$plg_datas = $dispatcher->trigger('plgVmOnUserStore', array($data));
same on line ~786:
$plg_datas = $dispatcher->trigger('plgVmAfterUserStore', $data);
must be:
$plg_datas = $dispatcher->trigger('plgVmAfterUserStore', array($data));
thx