I'm back, now for some silly reason the hack appears to only works if the admin is set to be Super Admin (ie added as super admin in config.php), and seems to have nothing to do with vBSEO.
In
<forum root>/includes/config.php:
Code:
$config['SpecialUsers']['superadministrators'] = 'x,y';
tldagent, can you test this for me please? I need it checked somewhere else apart from my testbed.