Hixie's Natural Log: Content-Type is dead2006-04-11 22:22 UTC Content-Type is dead Browsers and other user agents largely ignore the HTTP Content-Type header, relying on undefined sniffing heuristics to determine what the content of a page really is. RSS feeds are always sniffed, regardless of their MIME type, because, to quote a Safari engineer, "none of them have the right mime type". The target of img elements is almost always assumed
Content-Type is dead, for a short period of time, for new media-types,film at 11
Is HTTP Content Negotiation Broken as Designed? - Dare Obasanjo's weblog
