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Re:Learning from our Mistakes: The Failure of OpenID, AtomPu... by j_baker on Sunday January 30, 2011 @07:39PM (#2159727)
Just out of curiosity, what is an example of a draconian change that was added by XHTML?
Re:Learning from our Mistakes: The Failure of OpenID, AtomPu... by simonw on Sunday January 30, 2011 @09:04PM (#2159964)
If you're properly serving XHTML 1.1, you're supposed to use the application/xhtml+xml Content-Type, which means browsers are supposed to FAIL to render the page if there are any well-formedness erors.

It turns out that's a really bad idea on the Web.

Further reading: http://diveintohtml5.org/past.html