This warning keeps popping up in the logs:

WARN|Sat, 13 Sep 2014 15:30:37 +0800|core|asset pipeline|/assets/css/site.css|127.0.0.1||The Static Asset Pipeline is deprecated. It may yet come back to fight another battle someday.

The static asset pipeline is available to use in settings.yaml, and I have it set to true, and am using it for all assets. e.g.

<link rel="stylesheet" href="/assets/css/reset.css">
<link rel="stylesheet" href="/assets/css/site.css">
Answered by Jason Varga! Go to answer.