Fixed the blog!
After trying to install MoveableType at home, I had the same problem as I had on iiNet: my own username was unknown to my blog. So it wasn't just iiNet stopping CGI scipts from writing to disk as their tech support supposed.
The key was that it worked on the old iiNet server, it worked on the Solaris server, but not on the new iiNet web server or on my PC web server. It turns out that the Berkley DB database isn't backwardly compatible. My blog's database was in an older version of db than the new iiNet or my PC. I wasn't able to get the recommended fix, db_upgrade from anywhere at all.
Instead I exported the db from the working version, and then used the export files to repopulate an entirely new installation of the latest MoveableType. This worked!
Not all of the old templates are compatible with MT 3.2 for some reason, so I still need to tweak some pages to look good again. There are some weird characters showing up occasionally and even the tables got skewed, but I'm just happy it works again.
Dolphins aren't just as cute and fuzzy as people like to think - Lovecraft was right.
