This issue has been reported by two users.  This appears to happen if you are running Microsoft Internet Explorer Version 6.  You can either upgrade to a new version of Microsoft Internet Explorer, use Mozilla Firefox, or follow the steps below to work around the issue.  We are trying to duplicate the problem so it can be fixed.

1)  Erase the information you typed into the Emaill Address field on the registration form

2)  Use your mouse to click on the next field and continue filling out the form as normal

3)  After finishing the form and checking the box to accept the terms and conditions go back to the email address field and fill it in again

4)  Click "Register" - everything should go through ok now.