After a fresh install of Oneiric, following this test case: http://testcases.qa.ubuntu.com/Install/DesktopFree
with this iso from 20110922: oneiric-desktop-amd64.iso
when running the update-manager following instructions, it seems to work but reports the following on the console:
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gtk-WARNING **: Attempting to add a widget with type aptdaemon+gtk3widgets+AptProgressDialog to a GtkWindow, but as a GtkBin subclass a GtkWindow can only contain one widget at a time; it already contains a widget of type GtkVBox
** (update-manager:2780): WARNING **: expected enumeration type PangoEllipsizeMode, but got EllipsizeMode instead
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
(update-manager:2780): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
Status changed to 'Confirmed' because the bug affects multiple users.