Well, I'm stumped. I originally built this site as a test site at another web address and tweaked it so it looked right in Mozilla Firefox, Google Chrome and Internet Explorer. Last night, I installed it at this address, tweaked it exactly the same way…and it looks right in Mozilla Firefox and Google Chrome. In my version of I.E. (9), it adds odd spacing between items and clips off the bottom of the little line that says when the posting was posted.The test site still looks fine in all three browsers and I can't find any difference in the software between the test site and this one.To make things more maddening, the new version looks almost right in Internet Explorer 8.
If anyone out there is facile with WordPress and can offer a suggestion or three, I'd love to hear it. (Yes, I tried reinstalling WordPress. Yes, the two style.css files match exactly.) In the meantime, it's just going to look a bit odd in Internet Explorer.