Are there some particular browsers, html implementations, out there that
will choke on <br/> for example?

Every conforming HTML system will choke on <br/>

Not least any validator (such as the one at the w3c site which uses a
real SGML parser)

> What is your usage, percentage wise of xsl:output method="html" and why?

Every one of my stylesheets generating HTML uses the html
output. Stylesheets doing xml-xml transformations use xml, and
stylesheets writing text (latex or C code typically) use text. Probably
on balance html is the most common, I'm staggered that you should
suggest it isn't useful.

David


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