I don't know how, but I was upgrading from ubuntu 11.10 using:
sudo do-release-upgrade -d
Then after the upgrade and a reboot, I did:
sudo lsb_release -a
No LSB modules are available. Distributor ID: Ubuntu Description:Ubuntu Trusty Tahr (development branch) Release: 14.04 Codename: trusty
How was this possible? Is it possible to downgrade without a rebuild? I guess I'm an alpha tester for 14.04 now?