Error received when log button is clicked on bzr explorer for mac

[Talha Izhar]

bzr: ERROR: exceptions.AttributeError: 'NoneType' object has no attribute 'style'

Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/bzrlib/plugins/qbzr/lib/revtreeview.py", line 188, in paint
    style = widget.style()
AttributeError: 'NoneType' object has no attribute 'style'

bzr 2.1.2 on python 2.6.1 (darwin)
arguments: ['/usr/local/bin/bzr', 'qlog']
encoding: 'UTF-8', fsenc: 'utf-8', lang: 'en_US.UTF-8'
plugins:
  bzrtools /Library/Python/2.6/site-packages/bzrlib/plugins/bzrtools [2.1.0]
  email /Library/Python/2.6/site-packages/bzrlib/plugins/email [unknown]
  explorer /Library/Python/2.6/site-packages/bzrlib/plugins/explorer [1.0.1]
  extmerge /Library/Python/2.6/site-packages/bzrlib/plugins/extmerge [unknown]
  keychain /Library/Python/2.6/site-packages/bzrlib/plugins/keychain [0.1.0]
  launchpad /Library/Python/2.6/site-packages/bzrlib/plugins/launchpad [2.1.2]
  netrc_credential_store /Library/Python/2.6/site-packages/bzrlib/plugins/netrc_credential_store [2.1.2]
  news_merge /Library/Python/2.6/site-packages/bzrlib/plugins/news_merge [2.1.2]
  qbzr /Library/Python/2.6/site-packages/bzrlib/plugins/qbzr [0.18.4]
  rebase /Library/Python/2.6/site-packages/bzrlib/plugins/rebase [0.5.5]
  svn /Library/Python/2.6/site-packages/bzrlib/plugins/svn [1.0.2]
  upload /Library/Python/2.6/site-packages/bzrlib/plugins/upload [1.0.0dev]
  xmloutput /Library/Python/2.6/site-packages/bzrlib/plugins/xmloutput [0.8.6]