Karmic: Gnome-panel repeatedly crashes with panel clock enabled

Karmic 9.04 64-bit
gnome-applets 2.27.91-0ubuntu1
gnome-panel 1:2.27.4-0ubuntu1
gnome-panel-data 1:2.27.91-0ubuntu2
gnome-utils 2.27.91-0ubuntu1
gnome-system-tools 2.27.3-0ubuntu1

During today's karmic updates, upon reboot the gnome-panel continuously and repeatedly crashed, as when one issues a "killall gnome-panel" command. I was only able to stop the crashes by issuing the "killall gnome-panel" multiple times. The crashes stopped but of course I had no more panels.

The error causing the continuous recycling of the gnome-panel was the system not finding the proper files to run the panel clock. Here are some of the pertinent error messages:

****
Unable to open desktop file /usr/share/applications/bum.desktop for panel launcher: No such file or directory
(gnome-panel:5407): libglade-WARNING **: could not find glade file '/usr/share/gnome-panel/glade/clock.glade'

** ERROR **: /usr/share/gnome-panel/glade/clock.glade not found; this installation is incorrect.
aborting...
Trace/breakpoint trap (core dumped)

****

In any case, I removed the clock applet from the panel and the system booted normally.

SOLUTION:
Should anyone else experience this problem:
Stop the crashes with "killall gnome-terminal" if you can open a terminal.
Since you can't get to the panel to remove the clock, try to open a terminal, then gconf-editor.
Go to /apps/panel/applets and find the applet for the clock.
Go to the right panel of the applet, find the bonobo_iid entry ((OAFIID:GNOME_ClockApplet), right click and select "Unset key". That will stop the panel cycling.

Once I rebooted, I tried adding the clock back and immediately the panel started continuously cycling once again. Selecting "Unset key" for that newly created applet entry immediately fixed the problem.