I have the latest version installed [1.0.2].
Here is what I've done.
I've taken the "Top simple navigation + left subnavigation + 1 column" template and I'm calling the "cssmenu.tpl" menu template instead of the "simple_navigation.tpl" menu template. (I'm doing this because I need a horizontal and vertical flyout menu. I haven't really changed much except for colours.)
I'm using the default stylesheets except, I'm using the "Navigation: CSSMenu - Horizontal" stylesheet instead of the "Navigation: Simple - Horizontal" stylesheet.
Issue
The vertical flyout menu works in Firefox and not I.E. (6.0).
Question
Does anyone have any ideas why this would be?

I hope I've been as descripted enough for someone to fire off some ideas back at me. I've been racking my brain and I'm at a loss. I'm not expert at this stuff, so this may be my issue

Thanks,
P.S. If someone know where I can get a theme that has flyouts for both the top and left nav that would be great. I could just tweak from there.