bazaar explorer crashes when displaying a newly created shared repository

[John Charonko]

When creating a new shared repository with a single feature branch, the bazaar explorer GUI throws the following errors after building the files, when it tries to open and display the new shared repository. Deleting the feature branch allows the repository to open.

Using WindowsXP SP3.

bzr: ERROR: exceptions.TypeError: argument 1 of PyQt4.QtCore.QVariant() has an invalid type

Traceback (most recent call last):
  File "C:/Program Files/Bazaar/plugins\explorer\lib\explorer.py", line 1450, in callable_with_cleanup
  File "C:/Program Files/Bazaar/plugins\explorer\lib\explorer.py", line 1618, in _open_location_task
  File "C:/Program Files/Bazaar/plugins\explorer\lib\location_viewer.py", line 161, in add_location
  File "C:/Program Files/Bazaar/plugins\explorer\lib\location.py", line 178, in view
  File "C:/Program Files/Bazaar/plugins\explorer\lib\view_repository.py", line 272, in ui
  File "C:/Program Files/Bazaar/plugins\explorer\lib\view_repository.py", line 277, in refresh_view
  File "C:/Program Files/Bazaar/plugins\explorer\lib\view_repository.py", line 287, in _update_view
  File "C:/Program Files/Bazaar/plugins\explorer\lib\view_repository.py", line 394, in _update_model
  File "C:/Program Files/Bazaar/plugins\explorer\widgets\conditional_dataview.py", line 109, in setData
  File "C:/Program Files/Bazaar/plugins\explorer\widgets\conditional_dataview.py", line 172, in set_raw_data
TypeError: argument 1 of PyQt4.QtCore.QVariant() has an invalid type

bzr 2.2.1 on python 2.6.4 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzrw.exe', 'explorer']
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]
  explorer C:\Program Files\Bazaar\plugins\explorer [1.1.0]
  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]