Re: [Lynx-dev] A rant against IE from a Firefox-supporter

[David Woolley]

> 
> (Is "<br><br/>" valid?)

It's valid in XML, but there is a caveat not to use it in an interoperability
context.

Neither IE nor Lynx support XHTML natively, so both are used in the
XHTML appendix C interoperability context (which allows typical real life
HTML user agents, but not strictly conforming ones, to render XHTML as
though it were slightly broken HTML).  As such, I would say it was always
discouraged and always an error in contexts where either IE or Lynx would
try to render it, but not strictly invalid for user agents that support
XHMTL served as XHTML.

(validator.w3.org rejects it, under its default doctype.)