Enter a word in the search box (“MODTRAN” will produce a nice set of results) and click Search. That will lead to a Search Results page that demonstrates the problem.
The menus work fine on every other page of the site, so I don’t think the UL/LI/A structure has a problem, but I will check it carefully to be sure.
I did use a little code that checks the jQuery version, so I know it is loaded enough to reveal its version number.
Thanks for your help.
Jon