Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/UpdateManager.py", line 1099, in on_button_dist_upgrade_clicked
    fetcher.run()
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/DistUpgradeFetcherCore.py", line 278, in run
    _("This usually is caused by a system where /tmp "
  File "/usr/lib/python2.7/dist-packages/UpdateManager/DistUpgradeFetcher.py", line 41, in error
    return error(self.window_main, summary, message)
  File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 404, in error
    d.window.set_functions(Gdk.FUNC_MOVE)
RuntimeError: unable to get the value