Multi-level menu plugin

Multi-level menu plugin

Hey guys.  I'm working on this multi-level menu plugin, and it all seems to work fine until I specify a width for an item in the menu.  Then, the sub menu is shifted over to the right, and I can't figure out why. 

Here is the page without specifying the width.

Here is the page after specifying style="width: 100px;" on the "About Us" link.

In FF and Chrome, this works fine, but not in IE7.  Anyone have any ideas?