IE CSS Issue

I am having a problem with only one page of my website not reading the CSS. This is only happening in IE8 and earlier versions. The website works everywhere else.

https://www.clairepchandler.com

If you look in IE8 or an earlier version of IE, you can see that on the homepage (which is also the main blog page) the nav is not reading the stylesheet. It works on every other page of the website, as well as all other browsers. HELP!