qlog crashes on svn working copy

See traceback below.
--> Please note that "wap2" is a SVN working copy.
--> Invoking "bzr log wap2" works as intended.

bzr: ERROR: exceptions.AttributeError: 'BranchConfig' object has no attribute 'has_explicit_nickname'

Traceback (most recent call last):
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\trace.py", line 300, in reports_exception_decorate
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\log.py", line 233, in load
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\logwidget.py", line 210, in load_locations
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\loggraphprovider.py", line 362, in open_locations
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\loggraphprovider.py", line 302, in branch_label
AttributeError: 'BranchConfig' object has no attribute 'has_explicit_nickname'

bzr 2.2.1 on python 2.6.4 (Windows-XP-5.1.2600-SP3)
arguments: ['bzr', 'qlog', 'wap2']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.2.0]
  colo C:\Program Files\Bazaar\plugins\colo [0.1.0]
  cvsps_import C:\Documents and Settings\mek\Application Data\bazaar\2.0\plugins\cvsps_import [unknown]
  explorer C:\Program Files\Bazaar\plugins\explorer [1.1.1]
  fastimport C:\Program Files\Bazaar\plugins\fastimport [0.9.0dev]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.2.1]
  loom C:\Program Files\Bazaar\plugins\loom [2.2.1dev]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.2.1]
  news_merge C:\Program Files\Bazaar\plugins\news_merge [2.2.1]
  pipeline C:\Program Files\Bazaar\plugins\pipeline [unknown]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.19.2]
  rewrite C:\Program Files\Bazaar\plugins\rewrite [0.6.1]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.4]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.0dev]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.6]