2009 Jun 22, 3:12
HTML5's mime-sniffing is getting moved to an IETF doc: "Many web servers supply incorrect Content-Type headers with their HTTP responses. In order to be compatible with these servers, user agents
must consider the content of HTTP responses as well as the Content-Type header when determining the effective media type of the response. This document describes an algorithm for determining the
effective media type of HTTP responses that balances security and compatibility considerations."