I've run into an issue with the latest Safari on Mac OS X (10.9 & 10.10), where the printed page had a much smaller font size than on all other browsers. It looked like the entire page was zoomed out.

What's causing this is .container. Once I set it to width: auto for @media print, the problem. You can see the effect a bit on this page: http://jsbin.com/kamafuluxe/3. The difference between the print on Safari and other browsers is much bigger in our internal app though.

Happy to send a pull request