Comments should now be working again after X months of problems which I failed to notice - I just thought nobody was paying attention. Thanks to Randall for poking me in the ribs until I did something, and apologies to all.

As before, posts from new comment-leavers may be held for moderation. If you provide a name and email address (doesn’t even have to be a real one, just a consistent one) then the system will recognize you and that will only happen once.