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 1426, in show_app
    self._update_all(self.app_details)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 1278, in _update_all
    self._update_reviews(app_details)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 756, in _update_reviews
    self._check_for_reviews()
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 768, 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 401, in get_reviews
    raise Exception("failed to launch: '%s' (error: '%s')" % (cmd, e))
Exception: failed to launch: '['/usr/share/software-center/get_reviews_helper.py', '--language', 'en', '--origin', 'ubuntu', '--distroseries', 'natty', '--pkgname', u'gparted']' (error: 'glib.spawn_async: first argument must be a sequence of strings')