Hmm, I can't reproduce this anymore. Maybe just a temporary version skew between
control-center and gnome-applets

Created attachment 136469 [details]
gswitchit-bugreport

Created attachment 136470 [details]
gnome-panel-bugreport

I think this is the right place to report a bug that happens almost every second
time I logon to Gnome. 

Please find attached the two bug reports above. 

Cheers,
George

I have added a patch to gnome-applets to fix the immediate segfault (thats in
2.16.0.1-5). The real problem here is that bonobo-activation-server seems to not
die with the session sometimes, causing the next session to pick up an old b-a-s,
which contains the dbus-address of the previous session.