[jQuery] Superfish - navbar - FireFox issue - submenu overlap Issue

[VijayW]

This issue observed in Mozilla FireFox 3.5.3

I am creating a simple navbar menu with 1 level deep submenus.
The menu with "current" doesn't get hidden when another menu is
displayed.

In the following example when mouse over on "m2", along with m2's
submenus rest of m1's submenus were also visible.
seems that other submenus just stack over the current one and the
current one is Not hiding.

<ul class="sf-menu sf-navbar">
<li class='current'>
   <a>m1</a>
  <ul>
    <li><a>m1 sm1</a></li>
    <li><a>m1 sm2</a></li>
    <li><a>m1 sm3</a></li>
    <li class='current'><a>m1 sm4</a></li>
    <li><a>m1 sm5</a></li>
  </ul>
</li>
<li>
   <a>m2</a>
  <ul>
    <li><a>m2 sm1</a></li>
    <li><a>m2 sm2</a></li>
  </ul>
</li>
</ul>

Any clue?? any fix??