No offense to the op but this is another reason why I prefer OS X to any other operating system.. this stuff is built in. You can print any site right to PDF from any browser (as it's an OS feature). No Adobe needed.
Safari allows me to save my site, mentioned below, to PDF perfectly but also fails on your link and the opposite is true for pdfmyurl.com.
Edit: It appears to be the advanced option "print-media-type" that is the problem. Browsers do it by default and if you have pdfmyurl.com use it, the link you posted will look bad. I suspect that this would not be a problem if the theme did not restrict its CSS to "screen". I believe all of the CSS is dumped by the browser when printing because of this directive. The fonts are still correct so the link tags without media attributes probably have those CSS rules.
