I am playing around with this template in anticipation of using it (or your "Articles" template) for a public library I work for. I have noticed both in your own demo and in my instance the main menu takes a dump (i.e., the drop downs no longer work) when you click on features > Menu types > Joomla Spit Menu. How stable is the main menu code? This happens on IE, FF and Chrome.
Are you sure your are posting in product assigned forum?
What is your CMS version?
: Joomla 3.x
Link to installation
Have you edited any files? If yes tell us which ones.
Is this personal or client website?