So this is what is currently wrong:
- the Setup pages are all messed up, displaying things as ??conf.users.list?? etc. (No ideas from Support.)
- the calendar macro is still fucked up (known problem).
- the Recently Changed is still fucked up (known, I think, and probably a data migration issue.)
- older blog entries no longer show up on the index page (which is more or less what I want, except now that the calendar macro is fucked up there is no way to retrieve old blog entries).
I'm still tempted to try and write my own replacement but I really don't know. The problems to solve even to get this far are not trivial.