I followed the directions to update Gridcoin and verified using gridcoinstats that I was on the right fork. 10 hours later, I wake up to find it stuck on a block from 7 hours earlier. It took 2 restarts (this first locked Gridcoin) to get back to the right chain.

So everyone please check that you're on the right fork. It may take lots of restarts to put the bad forks out of their misery.