RSS Board: The proposal to request "application/rss+xml" as the MIME media type for RSS has passed with all 11 members of the RSS Advisory Board voting in favor.
https://www.rssboard.org/news/53/vote-board-supports-rss-mime-type
Randy: This is the rubber stamp that penetrates stone. That is, although we've alway known this to be true, it's now official. If you don't respond with the Content-Type: application/rss+xml, then your RSS is slightly invalid. It would be awesome if the FeedValidator spit out a warning for this case.
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