Ah, we are not on the same level.
select * from acs_permissions where object_id = 0;
Use the grantee_id to see which user is a SWA.
Can't you just dropdb? Did you reboot? I suppose "register/login-expired" shouldn't give you a request error unless it cannot find the page, maybe.
Try to figure out what really goes wrong. Or get on IRC. I need to go now.