Created attachment 21136 [details]
GNOME Packagekit Bug Report
failed to get a TID: A security policy in place prevents this sender from sending this message to this recipient, see message bus configuration file (rejected message had interface "org.freedesktop.PackageKit.Transaction" member "SetLocale" error name "(unset)" destination "org.freedesktop.PackageKit") (0)
GNOME Packagekit worked until new updates were downloaded and applied several days ago.
Please see http://blogs.gnome.org/hughsie/2008/12/08/cve-2008-4311-dbus-126/