Binary package hint: computer-janitor
If I start computer-janitor-gtk from a terminal on up to date natty and click the 'Clean up' button, I am given the following dialog:
"System clean up failure. System clean up could not complete. Be sure no other package manager such as Synaptic or Update Manager is running."
Here is the terminal output:
/usr/share/computerjanitor/computerjanitorapp/gtk/ui.py:94: GtkWarning: Could not load image 'computerjanitor-24x24.png': Failed to open file '/usr/share/computer-janitor/computerjanitor-24x24.png': No such file or directory
ERROR:dbus.proxies:Introspect error on :1.136:/: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.AccessDenied: Rejected send message, 1 matched rules; type="method_call", sender=":1.139" (uid=1000 pid=11347 comm="/usr/bin/python) interface="org.freedesktop.DBus.Introspectable" member="Introspect" error name="(unset)" requested_reply=0 destination=":1.136" (uid=0 pid=10718 comm="/usr/bin/python))
org.freedesktop.PolicyKit1.Error.Failed: Error getting subject: Error parsing unix-process subject: Value for key `start-time' found but is of type i and type t was expected
This looks to be related to bug #676485.