I set up a child theme for Twenty Twelve to customize it for a client of mine. I am still a bit new at the customization and it is a basic site for starters. It looks fine in Firefox, Chrome, Safari, but in Internet Explorer the nav bar is not centered and it does not have the different color of the text and the borders. I've looked around but not much I read makes sense. I'm hoping there is a simple fix. Any help would be much appreciated!