Thank you Robert for your reply. I thought I was going crazy. I even went through all of the wordpress tables in phpmyadmin, making sure somehow the data hadn’t gotten mangled. Man, was that a chore. Just about to give up when I saw your comment. Actually tried it on a second site and got the same issue. So there’s definitely something with the code of the theme.
It would be great to get a fix or a hack for this right away. My site’s not useable without the primary menu.