robjhyndman

Perfect. Thank you.

What I have in mind is a note appearing in the right sidebar next to where it is inserted in the post. I know a little css but not enough to know how to do that. Can you give any clues?

Update. This is the change that caused the problem: https://core.trac.www.ads-software.com/changeset/13424
The problem goes away if I manually revert to the original code, although this is a bit hacky for my liking. It would be nice if someone produced a plug-in to do the same, but that is beyond my php skills.

I’ve discovered that the problem is not identical stubs but numerical stubs. Apparently WP no longer allows purely numerical stubs. There is a bug report at https://core.trac.www.ads-software.com/ticket/5305 and a supposed fix at https://www.ads-software.com/extend/plugins/allow-numeric-stubs/. But the bug report is for an old version (2.3.1) and I’ve been using numeric stubs with 2.9.2 with no problems. Also, the plugin does not seem to fix the problem with WP3.0.

I’ve tried that. If I try to manually change the slugs back to what I want, the changes are not retained. This used to be the case only when there was another slug at the same level (e.g., you couldn’t have two top-level pages with the same slug). But now it seems to be the case regardless of where the pages are in the hierarchy.

See https://robjhyndman.com/fpp/4/ for an example.