jbossas/jboss-as — pull request #2139 by jsight (2012-04-25 13:16:09+00:00)
Title: Referer is spelled "Referer" by the HTTP specification:

http://en.wikipedia.org/wiki/HTTP_referer

Pulling the header from "Referrer" means that the code to parse the referer header will never be triggered by a real browser.