Looks like the Endurance Page Cache was the problem. There’s a setting in WordPress to disable it (Settings -> General -> scroll to the bottom).
Thank you!
I just upgraded (on my staging system, not my public site). It appears that every existing comment has been duplicated: I now have two copies of each comment.
Any idea why, or how to fix (aside from going through and deleting all the duplicates)? How about avoiding the problem when I update my public site?
Thanks,
Bob
