I pin my TLS certificates with the excellent Certificate Patrol browser plugin because otherwise it is just not safe. I just noticed that the certificate of HN changed from Comodo to Entrust, but saw no prior warning. I don't expect it to be a hack, but can someone confirm?
(obviously I would have a problem trusting information posted back here as I'm questioning the potential veracity of the whole domain, but I'm willing to take the bet that I'm not really that interesting to mess around with)