I have upgraded the site to the latest Drupal 5.1. For a short time that means some features I coded won't be available until I re-patch, such as my anti-spam comment tool (comments are moderated for now.) If stuff is broken, let me know. (I don't know what happened to the category menus and will try to get them back.) I'll also be adding some new features, such as RSS feeds of comments and nodes and some other things mostly only seen by those who create an account.
I've put in drupal's simple captcha module which does a math problem instead of the old simple question I had. It seems to be generating an sql error, but is otherwise working. I may change it to the simple text question as a default captcha is subject to spammer attack.
Drupal has had a pretty terrible upgrade procedure for some time now, with upgrade consisting of simply replacing the entire file tree, and proctecing your local config. This had no accounting for local changes to code or even installed modules. At least in 5.0 they have moved to putting non-core modules and themes in their own site-only directory. I'm also now installing from CVS which should let me make my changes and import their changes as well.