I was just about to say that the upgrade was what solved the problem, but before I did, I decided to check my new menu one more time and sure enough -- no response.
Honestly, it was working fine earlier today on another computer (running Windows XP). And now I'm on my home computer (also running XP) and it's ignoring me.
To make sure I'm not overlooking anything with the upgrade, here's what I did:
--uploaded the files to my directory on my server
--modified the "menu_data.js" file (actually, I pasted everything in from my original one because it basically looked identical; is that where I went wrong?)
If you care to take a look, here's my site (it's still in development, but the menu is current):
http://www.familywebwatch.com/index2.php