Thanks to Mr. J. Reay of Pimlico (I think) for solving the annoying jumping links issue. I've changed the padding in the #links section of the stylesheet to make the left padding pixel- rather than percentage-based. I don't think I would have thought of that in a proverbial month of Sundays.
The issue has now disappeared, which I'm pleased about. The disconcerting thing is that the issue never presented itself in Firefox.
