Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/view/widgets/wkwidget.py", line 126, in _on_title_changed
    f(*args_list)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview.py", line 416, in on_button_install_clicked
    self._run_transaction(trans)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview.py", line 590, in _run_transaction
    self._setup_http_proxy(trans)
  File "/usr/share/software-center/softwarecenter/view/appdetailsview.py", line 579, in _setup_http_proxy
    if client.get_bool("/system/http_proxy/use_http_proxy"):
GError: Failed to contact configuration server; some possible causes are that you need to enable TCP/IP networking for ORBit, or you have stale NFS locks due to a system crash. See http://projects.gnome.org/gconf/ for information. (Details -  1: Failed to get connection to session: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.)