GitHub's issuing CA has expired (DigiCert High Assurance EV Root CA) Posted by nlo on Sunday July 27, 2014 @05:39PM from the i.imgur.com dept. https://i.imgur.com/UuzvrIt.png ( 3 comments | 4 points | on HN )
Github, Bitbucket, Heroku, and even DigiCert's own site.
...if I only knew more about computers. :(