Hi everyone, I'm hoping you wizards can help me out here!
Do you have a link to the site? See it now, sorry... Works great in IE8... and Firefox.
to: "the menu in the left column extends way too far across the page".
Did you already search in your really large "mainNav.css" for the attributes of your <div id="leftCol"> and <div id="navcontainer">.
The other possibility is, of course, to ask the people of MMMenu.