Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/gtk/viz/branchwin.py", line 430, in _refresh_clicked
    self.treeview.update()
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/gtk/viz/treeview.py", line 178, in update
    self.branch.lock_write()
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 1325, in lock_write
    repo_token = self.repository.lock_write()
  File "/usr/lib/python2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 2032, in lock_write
    raise errors.ReadOnlyError(self)
ReadOnlyError: A write attempt was made in a read only transaction on KnitPackRepository('file:///home/username/devel/brain/chantier/fff2/.bzr/repository/')