I think I broke something
Fiddling with the tags on my LiveJournal entries just now, I figured I'd use the "rename tag" feature to merge those tagged with quote (3 entries) into those tagged with quotes (57 entries). So I renamed quote to quotes. And was presented with quote: 1 entry, quotes: 57 entries. Er. So I manually edited the one entry that was tagged with quote, retagged it as quotes, and saved it. The Manage Tags page is still claiming there's one post tagged with quote, and if I click on Display Journal Entries I get no posts.
Oops.
Oops.