I figured it out. Before cloning the site I had upgraded from 3.1 to 3.2. After the upgrade I had stopped and restarted nginx, but I had not bounced the uwsgi daemon which was caching the older version of Django (not the first time I've been bitten by that, so shame on me, I have no excuse 😂). Once I did that, the behavior of the original server mirrored that of the cloned test server.
So somewhere between 3.1 and 3.2 the was a behavior change which added the display of a subtitle where there had been none before. Oddly, I went through every page of release notes between 3.1.0 and 3.2.0 and the string "subtitle" doesn't appear on any of those pages. If there was a mention of this very visible, non-trivial change using other wording, I missed it. So now I'm off to figure out the best way to suppress this new subtitle. Ideally there's a configuration setting which will do the trick, but I looked at the code and the docs and nothing jumped out at me, so it looks as if I'll just have to add some custom CSS. -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/6517c7c6-2087-4898-9289-b8934a8ba403n%40googlegroups.com.