Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/view/appdetailsview.py", line 176, in _on_cache_ready
    self.show_app(self.app, force=True)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 1425, in show_app
    self._update_all(self.app_details)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 1277, in _update_all
    self._update_reviews(app_details)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 755, in _update_reviews
    self._check_for_reviews()
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 767, in _check_for_reviews
    self.review_loader.get_reviews(self.app, self._reviews_ready_callback)
  File "/usr/share/software-center/softwarecenter/db/reviews.py", line 395, in get_reviews
    standard_output=True, standard_error=True)
TypeError: glib.spawn_async: first argument must be a sequence of strings