After many, many weeks of procrastination, I finally got around to upgrading Geeklog on this site. The "Smooth Blue" theme that I'm using doesn't actually come with the new Geeklog version. In fact, it only comes with one theme (the one I'm not using). I had to do a little tweaking to get the basics to work and admin functions are a little bit quirky. The last Geeklog version upgrade also didn't come with this theme, but the upgrade didn't actually break it last time.
Maybe I should dump the Smooth Blue theme and try something new. Oh well.