@zuggi
When I looked at your account the requests were coming form 174.132.171.162 which resolves to br14.hostgator.com.br
I added that you your allowed referrers list and it is working now, but Brandon and I will have to discuss this further. Ultimately as a free user you will be required to use the javascript method in the near future and that will resolve the issue as it will only recognize the domain name, and not the IP address.
But I don't think we should white list entire hosting providers because I think that will ultimately defeat the purpose of this initiative.
Best Regards,
Frank