bzr viz complains about __init__ arguments

I'm running Ubuntu Feisty Fawn, with bzr 0.13 and bzr-gtk 0.13.

Tried both with bzr .deb package with bzr-gtk from .tar.gz and both bzr-0.13 and bzr-gtk-0.13 tar.gz.

The bzr-gtk package in Feisty Fawn is 0.12, same problem there.

Running with python 2.4.4.

I'm getting the following error:

bzr: ERROR: exceptions.TypeError: __init__() takes at most 2 arguments (3 given)

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 626, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 588, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 292, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/gtk/__init__.py", line 126, in run
    app.show(branch, revid, limit)
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/gtk/viz/bzrkapp.py", line 32, in show
    window.set_branch(branch, start, maxnum)
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/gtk/viz/branchwin.py", line 283, in set_branch
    message = revision.message.split("\n")[0]
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/gtk/viz/graph.py", line 50, in get_attribute
    self._load()
  File "/usr/lib/python2.4/site-packages/bzrlib/plugins/gtk/viz/graph.py", line 61, in _load
    self._revision = self._repository.get_revision(self.revision_id)
  File "/usr/lib/python2.4/site-packages/bzrlib/decorators.py", line 38, in read_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.4/site-packages/bzrlib/repository.py", line 936, in get_revision
    return self.get_revision_reconcile(revision_id)
  File "/usr/lib/python2.4/site-packages/bzrlib/decorators.py", line 38, in read_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.4/site-packages/bzrlib/repository.py", line 332, in get_revision_reconcile
    self.get_transaction())[0]
  File "/usr/lib/python2.4/site-packages/bzrlib/store/revision/knit.py", line 92, in get_revisions
    [revision_id,
TypeError: __init__() takes at most 2 arguments (3 given)

bzr 0.13.0 on python 2.4.4.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'viz']

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