Secure connection failed

Hi

I’m currently getting the above error on a site I have visited frequently, when trying to access it from my main computer. Full message is…

An error occurred during a connection to www.u3abeacon.org.uk. SSL received a record that exceeded the maximum permissible length. Error code: SSL_ERROR_RX_RECORD_TOO_LONG

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.

I’ve looked at certificates in “options” and I don’t have one for the site. When I try to add it as an exception I get “No information available, unable to obtain identification status for this site”.

I can, however, access the site using Ice Dragon on my laptop.

Any help would be greatly appreciated.