using special-display-regexps

[Barman Brakjoller]

I'm trying to teach emacs to treat some buffers in a special way using
this code that is supposed to work:

(setq special-display-regexps 
      '(("jabber-chat" 
      ((top . 10) (height . 5) (left . 200)))))

In the documentation string thew following can be seen:

  *List of regexps saying which buffers should have their own special
  frames.  If a buffer name matches one of these regexps, it gets its
  own frame.  Displaying a buffer whose name is in this list makes a
  special frame for it using `special-display-function'.

  An element of the list can be a list instead of just a string.
  There are two ways to use a list as an element:
    (REGEXP FRAME-PARAMETERS...)   (REGEXP FUNCTION OTHER-ARGS...)
  In the first case, FRAME-PARAMETERS are used to create the frame.

It works only half way, emacs opens up matching buffers in a new
frame, but the supplied frame parameters is not applied.

What am I doing wrong?

I have loaded emacs using --no-init-file and --no-site-file but to no
avail.

/Mathias