Kai Grossjohann writes:

> *Very* nice!

Well, not quite...

> Only the \202¹ and the \202æ aren't highlighted (...)
           ^^^^^         ^^^^^

Related to this, maybe?
  gnus-art.el:    (set-buffer-multibyte t))
  gnus-msg.el:      (set-buffer-multibyte t)))
  message.el:    (set-buffer-multibyte t))
Lars, please tell us that's just temporary code to make us test
gnus+MULE...

-- 
Hallvard