This approach worries me because it sets the `Expires` header to the far future for [all assets](https://github.com/gittip/www.gittip.com/tree/89ed4558d6fc703adb75498781deeb21db54dad4/www/assets), not just the ones in the `%version` directory. That means that if any of those files change content but not name, we're very likely to break the website for some users.

Is there a reason we're not versioning all of our assets? If it means that when we deploy everyone has a 100% cache miss on their first page load, that doesn't sound so bad.