(Edit)

"Must have been a temporary glitch as the forums seem to be back up.)

This is all I get through Firefox and IE:

"Secure Connection Failed
      
 An error occurred during a connection to forums.butterflylabs.com.

The OCSP server has no status for the certificate.

(Error code: sec_error_ocsp_unknown_cert)

  The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
  Please contact the website owners to inform them of this problem. Alternatively, use the command found in the help menu to report this broken site."