baz-import fails with AttributeError

Using current dapper packages of bzr and bzrtools, I get an AttributeError running 'bzr baz-import':

12:58:48~/archives $ bzr baz-import ~/<email address hidden> <email address hidden>
importing <email address hidden>/airtunes--devel--0 into /<email address hidden>/airtunes/devel
bzr: ERROR: exceptions.AttributeError: 'TextUIFactory' object has no attribute 'nested_progress_bar'
  at /usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools/baz_import.py line 405
  in import_version
12:59:09~/archives $ bzr --version
bzr (bazaar-ng) 0.8pre
Copyright 2005,06 Canonical Development Ltd.
http://bazaar-ng.org/

bzr comes with ABSOLUTELY NO WARRANTY. bzr is free software, and
you may use, modify and redistribute it under the terms of the GNU
General Public License version 2 or later.
12:59:43~/archives $ dpkg --list bzr
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
ii bzr 0.8~2006032008 bazaar-ng, the next-generation distributed v
13:00:14~/archives $ dpkg --list bzrtools
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
ii bzrtools 0.8~2006032018 Collection of tools for bzr

Exception from .bzr.log:

bzr 0.8pre invoked on python 2.4.2.final.0 (linux2)
  arguments: ['/usr/bin/bzr', 'baz-import', '/<email address hidden>', '<email address hidden>']
  working dir: u'/home/stub/archives'
looking for plugins in /usr/lib/python2.4/site-packages/bzrlib/plugins
Plugin name __init__ already loaded
Plugin name __init__ already loaded
Plugin name __init__ already loaded
add plugin name bzrtools
load plugin (None, '/usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools', ('', '', 5))
registered plugin command shelve
registered plugin command unshelve
registered plugin command shelf
registered plugin command clean-tree
registered plugin command graph-ancestry
registered plugin command fetch-ghosts
registered plugin command patch
registered plugin command shell
registered plugin command fix
registered plugin command branch-history
registered plugin command baz-import-branch
registered plugin command baz-import
registered plugin command push
loaded succesfully
looking for plugins in /home/stub/.bazaar/plugins
trying to open '/<email address hidden>' with transport <bzrlib.transport.local.LocalTransport <email address hidden>/>
[22161] Thu 13:06:53.477 ERROR: exceptions.AttributeError: 'TextUIFactory' object has no attribute 'nested_progress_bar'
  at /usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools/baz_import.py line 405
  in import_version
Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 647, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 609, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 241, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools/baz_import.py", line 791, in run
    reuse_history_list, prefixes=prefixes)
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools/baz_import.py", line 830, in import_archive
    standalone=standalone)
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/bzrtools/baz_import.py", line 405, in import_version
    progress_bar = bzrlib.ui.ui_factory.nested_progress_bar()
AttributeError: 'TextUIFactory' object has no attribute 'nested_progress_bar'

return code 3