This is just a quick note to let you know that vBulletin.com is experiencing DNS problems due to technical difficulties with our registrar (they put corrupt data into the DNS system and as a result the world's DNS servers don't know where to find vBulletin.com).
We are working to see if the problem can be resolved, but it may be that we have to wait for the various DNS servers around the world to refresh themselves with the correct, uncorrupted data.