Something in my code is writing an inline style to my navigation submenus that keeps their width at 12em, which is too narrow for some items. Here is the site: http://yogajyoti.net/wordpress/. If you hover over "Yoga" you will see what I mean.
I have seen other posts such as this one: http://stackoverflow.com/questions/5034826/wp-nav-menu-change-sub-menu-class-name, but it doesn't help. I know basic php but I don't find an answer in there.