GoDaddy changed our IP address a few days ago. (208.109.138.8 -> 208.109.138.80)
I updated the DNS for forum.liberty.asn.au Sunday morning, but it's taking a while to flow though to all the DNS servers.
If you see a "permission denied" message, it's going to the old server.
Shutting down all copies of your browser, then starting them up again MIGHT help. Otherwise it should fix itself within 24 hours.