[chrishajer]

Null, I looked at your site. No underlines appear for me with IE7 either, whether hovering or not. So, I don’t think it’s the :hover pseudo class problem (and especially since the :hover is applied to <a> elements.

It looks like the underline might be behind the #cleaner div in IE, where it’s on top of it in FF. Can you try making the #wrapper-menu taller and see if you can see underlines then? I am guessing they are there, just not visible since they’re behind the #cleaner div.

Is there a tool comparable to the web developer extension for FF, on IE? I installed the IE Developer toolbar, but it does not give you the ability to modify the CSS and see the changes.