JSLint doesn't like vendor extensions in pseudo-selectors, even with
the `css` options toggled.

I'm thinking specifically of `button:-moz-focus-inner`, which I'm
finding necessary to standardize a 3px-padding in Gecko's rendering of
buttons that's otherwise impossible to get rid of ( see
http://stopdesign.com/archive/2009/02/04/recreating-the-button.html#comment-4379
). If you've got time to take a look, I'd like to see the following
snippet parse correctly:

@charset "UTF-8";
button::-moz-focus-inner {
padding: 0;
border-style: none;
}

I've hacked together a workaround in my local copy, but I think it's
something that ought be addressed upstream.

Thanks for taking a look!

-Mike