This will teach me to meddle with perfection. :-) I had made a lot of changes to the Blogger site template, and everything was working just fine.
Then I decided I wanted to see how many people actually look at this blog. I signed up at Sitemeter for a counter, and gee, there is a handy tool there to insert it into your template. So I used it, and the result is my sidebar is no long my sidebar. Oh, and no counter.
It's late and I'm tired. I'll look at it tomorrow.