In (almost) less time than it takes to write about it, I’ve updated the site to the latest version of MovableType, 3.14.
This version offers little in terms of new visible functionality, but behind the scenes major improvements have been made in how MT responds to and manages comment spam. In particular, unnecessary site rebuilds are avoided (and there was much rejoicing from the ISPs hosting movabletype sites).
There is one thing I need to remember when doing these updates, and that is to copy my search templates from the prior release. Other than that, things look fine, which is typical after an MT upgrade.