It appears the link sent in the registration email was somewhat scrambled, and clicking on the link in some cases results in an error message.
Copying the link and pasting it into a new browser window works for most people.
Those registering from this point forward should have no trouble.
If you have already registered, and copying and pasting the link still does not work for you, please email the Webmaster for a new link.
We apologize for any inconvenience.