Everything looked great in WP 3.4. When I upgraded to 3.4.2, the CSS seems to have lost its mind.
Maybe it's a problem with edits I'd made, so that something was overwritten in the upgrade? But I don't think so. Or maybe a change in the included jQuery threw things off?
Specifically, the far-left column (with the times in it, CSS div class "vertical column") lost its float: left and width: 100px definitions, so everything got pushed down below it. Also, for some reasons, all the colors vanished...?