vc-dir and Bazaar

[Stephen Berman <stephen.berman@gmx.net>]

The Emacs manual (32.1 Version Control) says: "The Emacs version control
interface is called VC.  Its commands work with several different
version control systems; currently, it supports GNU Arch, Bazaar, [...]"
and (32.1.6 VC Directory Mode): "The VC Directory buffer works with all
the version control systems that VC supports."  But when I type `C-x v
d' (vc-dir) and at the prompt enter the directory of my bzr Emacs trunk
tree, all I get is this:
===============
VC backend : Bzr
Working dir: /data/steve/bzr/emacs/trunk/
Parent branch      : http://bzr.savannah.gnu.org/r/emacs/trunk/
Shelves            : No shelved changes

                         ./
===============
No files are listed, although the parent branch contains changes against
my working directory.  And when I type `+' (vc-update), all I get is the
message from vc-call-backend: "Sorry, merge-news is not implemented for
Bzr".  (I don't understand the message; I thought I was invoking update,
not merge or merge-news, whatever that is.)

So does vc-dir not work with bzr, contrary to the manual, or do I need
to do something else?  I have no problem using bzr from the command
line, updating the trunk, merging, etc.  This is with 
Bazaar (bzr) 2.1.0
  Python interpreter: /usr/bin/python 2.6.2
  Python standard library: /usr/lib/python2.6
  Platform: Linux-2.6.31.12-0.2-default-i686-athlon-with-SuSE-11.2-i586
  bzrlib: /usr/lib/python2.6/site-packages/bzrlib
  Bazaar configuration: /home/steve/.bazaar
  Bazaar log file: /home/steve/.bzr.log
and
GNU Emacs 24.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.18.6) of
2010-07-18 on escher

I'd be grateful for any help.

Steve Berman