Font size and layout errors

I’m using the Calotropis theme for the following website:

http://www.fordlibrary.org

And right now when you view it in Internet Explorer 8, the sidebars are way out of place and most of the fonts are much too big. I hadn’t changed anything prior to this happening, so I’m at a loss. If you use IE’s Compatibility mode the sidebars go back into place, but the text is all still too big.

I tried to go into the CSS stylesheet, but I don’t see any code to edit in order to change the font size. I don’t see much of anything there, really! Do the theme authors host their own stylesheets elsewhere? The website listed for this theme’s author is down.

There’s a section in the theme options to insert CSS, but can I change it back if it’s wrong?

This is all there is in the style.css file, and the main index and sidebar templates are blank:

[CSS code moderated – a link to your site is enough to access the styles]