A small problem with parsing:
when a js or css file is in a link so that it can be viewed 
(<a href="file.css">read the source</a>), even in a 
textarea or pre block, the file is parsed and this 
generates a lot of html error files with any missing file 
extension.
Is it really useful? 
Java applet are sometimes parsed, sometimes not and values 
are not parsed any more with the new versions 
(value=text.html or value="text.txt" ...)