I downloaded the latest stable version of Moodle and upgraded HEDD. All seems to be working properly at this point.

Upgrade procedure:

1. Set the site in maintenance mode (only admins can log in).
2. Archive old /data/moodle directory (I use tar, but the rsync nightly copy ought to work).
3. Unpack the new Moodle distribution into /data/moodle.
4. Go to the admin URL (/admin). Moodle will automatically detect the new version and perform the upgrades.
5. Look around to make sure things are ok.
6. Turn off maintenance mode.

ETA: The upgrade from 1.5.1 to 1.5.3+ does not seem to work properly for the wiki module. I grabbed the tarball I made in step 2 and made that the active version. The database now complains slightly about prior version numbers when entering admin mode, but the site works properly.

I upgraded milter-greylist from version 2.0b5 to 2.0.2 this morning. A new configure option, —with-libspf2_10 is required for the version of the SPF library we have. Installing requires changing the program name from milter-greylist to greylist, as the rc.d script I wrote for FreeBSD 5 uses the latter.