I'm seeing it on two networks (home wifi and work vpn). I googled for news, but didnt' see anything… anybody else running into it?

Honestly, no. I see a secure connection, and the correct DigiCert certificate is showing up. What does the invalid/inaccurate cert look like for comparison?

It looks like it was caused by the os x upgrade I did this morning.

Here's the cert chain: <https://www.dropbox.com/s/mszr4ntkq9srl6f/Screen%20Shot%2020...

Here's one person's fix: <http://benscheirman.com/2014/02/fixing-github-ssl-issue-on-1...

Here's the super user thread: <http://superuser.com/questions/605900/why-wont-os-x-trust-gi...

Delete your stapled CRL cache and restart, its in /var/db/cslr