bsabath on "[Theme: Customizr] Drop down menus on tablets and smartphones"

I am building a new website using the wordpress customizr theme (3.0.10) at brucesabath.com/wp13.
I have menus with dropdown submenus that work with hover-over on a computer, but don't work on an iphone or ipad. Some menu items are only single level, and they do work with a click on both mobile devices, but nothing happens when you click the top-level of the multi-level items.
The problem is NOT related to screen size, since when I shrink the window on my PC (to simulate an iphone screen), the menus work fine.
Thanks in advance!