Yes, another IE-only problem for your Thursday. 🙂
http://jsfiddle.net/dex3703/nwTUm/
This layout looks fine in Chrome, but the li in both the top horizontal menu and the left side vertical menu includes an offset in IE9. IE shows this in the F12 tools when I select an li and look at the “Layout” tab.
(Note that if you look at the fiddle in IE, it displays properly in the result window!)
Any other comments regarding tidying up the markup/css appreciated. Also I’m only interested in IE9.
I restarted the computer and it works fine in IE9 and Chrome…. Hooray web dev.