Thanks everyone, that's very reassuring.

Now I can spend what remains of my evening wondering about the thing she just did, which was, at her last feed before going down to bed for the night, she took a little from one breast, then absolutely screamed when I put her to the other. Which I tried twice, then again after I'd changed her nappy. That's a new one to me, and I have no idea what the problem was. She's been cranky before, of course, but never cranky about the very idea of feeding.

Well I guess it keeps us on our toes, the way they keep changing.