First off, I love the theme. I have created a child theme to make some modifications but I've run into an issue with the nav submenu items.
If you look at the site http://brightstarscreening.com in IE9, when you roll over "About Us", you see the submenu appear, but there appears to be a clear margin (or something) underneath each item so they are not flush against each other.
If you look at the site in Chrome and roll over "About Us" it also has the clear margin, but if you roll over "About Us" a second time, the submenu items squeeze together so they appear as they are supposed to.
I looked for an answer in the Display forum, but only found issues with a gap between the main nav and sub nav. I already added the descriptions for each menu page (but colored them to match the background) and I upgraded to the most recent version of display.
Any idea how to fix this?