Hit zone of the suckerfish drop-down menu

Hello! Is there a method of enlarging the hit zone (clickable region) of the initial parent suckerfish drop-down menu? I notice that when I roll my mouse over the top of the parent item it doesn't activate. It activates when I move my mouse lower in the parent region. Is this possible to tweak?

For example. I have the suckerfish working on this site:

http://variantcube.com/les/

If you roll over the menus here they work perfectly because I think the search area is available above the suckerfish area. However if I delete that search area the entire menu bumps up and then I lose some of the hit zone area. What should I tweak in the CSS to correct this?

Thanks!