It seems a shame that Blogger released new templates just after I'd gone through all the trouble of figuring out the last one and tweaking it. Now I have a new (far more complicated) template to tweak.
And I'm far from finished. I'll get the old stuff back in the sidebar, fix any overly large photos so that they display properly, and figure out how to implement the in-Blogger comment feature. Don't worry: all the old comments have been saved in text files, and I will provide links to them at the end of the posts in which they were made (see the previous post).
Overall, though, I see this as an improvement. I mean, it isn't really anything I couldn't do by myself if I were really, really good at designing webpages; but I'm not, so this is a change for the better.