Enhancements to the Builder experience, including new security concepts and numerous small bug fixes.
Two or three general bug fixes as well.
By the way, I fixed a bug today which had been preventing Poobah, Palchinsky and other Builders from receiving all of the rewards you've kindly spiffed them. If you wouldn't mind checking your Reward commands again, you might find that you haven't actually rewarded them as much as you'd intended.