Traceback (most recent call last):
  File "/usr/bin/software-center", line 88, in <module>
    from softwarecenter.app import SoftwareCenterApp
  File "/usr/share/software-center/softwarecenter/app.py", line 48, in <module>
    from view.installedpane import InstalledPane
  File "/usr/share/software-center/softwarecenter/view/installedpane.py", line 33, in <module>
    from softwarepane import SoftwarePane, wait_for_apt_cache_ready
  File "/usr/share/software-center/softwarecenter/view/softwarepane.py", line 48, in <module>
    from  appdetailsview_gtk import AppDetailsViewGtk as AppDetailsView
  File "/usr/share/software-center/softwarecenter/view/appdetailsview_gtk.py", line 42, in <module>
    from softwarecenter.gwibber_helper import GWIBBER_SERVICE_AVAILABLE
  File "/usr/share/software-center/softwarecenter/gwibber_helper.py", line 51, in <module>
    GWIBBER_SERVICE_AVAILABLE = gwibber_has_accounts_in_gconf()
  File "/usr/share/software-center/softwarecenter/gwibber_helper.py", line 46, in gwibber_has_accounts_in_gconf
    v = client.get("/apps/gwibber/accounts/index")
GError: Failed to contact configuration server; the most common cause is a missing or misconfigured D-Bus session bus daemon. See http://projects.gnome.org/gconf/ for information. (Details -  1: Server ping error: IDL:omg.org/CORBA/COMM_FAILURE:1.0)