Automattic/underscores.me — pull request #26 by jacklenox (2014-07-01 11:26:43+00:00)
Title: Added a favicon.ico and reference in header.php

Not sure how desired this is, but I'd quite like to see an _s favicon among my tabs. I've upped the contrast on it a bit so that it's clearer in such a tiny format. It's also retina-compatible.