Yes for WebForms EPiServer CMS parses the outgoing HTML stream for rewriting of links from internall to external (FURL) format. It is possible programatically to disable HTML parsing for a specific template (with consequence that any links on that template will be in internal format). Let me know if you want to disable HTML parsing for that template then I can look up how to do that (I cant remember how that is done off the top of my head)
I have a HTML-comment like this:
When this renders, I get this:
This is highly amusing. :) This is placed inside of a template page. If I move this to an ordinary, plain and simple ASPX-page it renders perfectly! Does anyone know if EPiServer somehow tries to parse the HTML for links or such?