Ok, I've made the decision: As soon as I finish converting everything from HTML to XHTML, my documents will be sent as
application/xhtml+xml, with no content type rewriting magic done server side. This means, as you probably already know, that IE users will be "blocked" out of my site. Incidentally, I've changed my philosophy somewhat. I no longer see it as me blocking users from my site; the content is out there, and it's viewable. It's your software that sucks. Get, something, better.