Netflix/netflix.github.com — pull request #1 by joesondow (2012-09-07 14:14:46+00:00)
Title: Add cache-busting parameters to CSS URLs

Instead of expecting each anonymous web visitor to clear their browser's history in order to avoid seeing the wrong layout after a CSS change, alter the CSS URLs by adding a version or timestamp parameter that we can change any time the CSS changes and we want to ensure that all visitors get the latest CSS file.