see this check of the system, which does post there are revocations in the ssl chain:
https://www.ssllabs.com/ssltest/analyze.html?d=sudoroom.org

This problem only shows up for modern firefox for me, so I'm inclined to take this advice:
http://it.i88.ca/2014/02/how-to-solve-secure-connection-failed.html

this post suggests the godaddy cert could be the problem (sounds probable):
http://forum.nginx.org/read.php?2,160046,160049

// Matt

On Mon, May 12, 2014 at 1:35 PM, Matthew Senate <mattsenate@gmail.com> wrote:

I'm unable to connect to sudoroom.org on debian with iceweasel (basically firefox 30):

Secure Connection Failed

An error occurred during a connection to sudoroom.org. Peer's Certificate has been revoked. (Error code: sec_error_revoked_certificate)