joomla/joomla-platform — pull request #1289 by piotr-cz (2012-06-17 12:44:08+00:00)
Title: Standardize default Content-Type handling across all transports.

According to IETF (http://www.ietf.org/rfc/rfc2616.txt) and W3C (http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2) are case-insensitive, but in both documentations used in camel case.