JQuery :: Superfish Submenus Open Under Current Menu Item

I'm trying to get Superfish menus working on a new site I'm building, but have run into a problem. I have used the feature of setting a class on the current menu item so that it will be highlighted (highlit?). The trouble is that if the menu item has a submenu this submenu is displaying already opened when you hit the page.

I've set the menus up with the following options:
$('ul#nav').superfish({ hoverClass: 'sfHover',
pathClass: 'current',
pathLevels: 1,
delay: 800,
animation: {opacity:'show'},
speed: 'normal',
autoArrows: true,
dropShadows: true,
disableHI: false
});

This is a snippet of the menu code just for completeness, although it's pretty generic:
<ul id="nav">
<li><a href="index.html">Home</a></li>
<li class="current"><a href="agenda.html">Agenda</a>
<ul>
<li><a href="stream_busdev.html">Business Development Stream</a></li>
<li><a href="stream_techsupp.html">Technical and Support Stream</a></li>
<li><a href="stream_partners.html">Partners Stream</a></li>
<li><a href="stream_paytrain.html">Payroll and Training Stream</a></li>
</ul></li>
... more menu items in here ...
</ul>

I've also attached a screengrab, in case it helps, since the site isn't live yet. So I guess what I'm asking is: is there a way to have the current parent menu item marked as current without it automatically opening the submenu?