It occurred to me just now: is there anything interesting in /var/log/daemon.log that isn't in the other journals? I've just found bug 231180 about users-admin reporting the very same error, but with different symptoms.
And even more interestingly, bug 332050 is about a problem with bzr-gtk failing to work *the first time it is run* because of the seahorse D-Bus service. So that problem is not only with the gnome-system-tools.
It occurred to me just now: is there anything interesting in /var/log/daemon.log that isn't in the other journals? I've just found bug 231180 about users-admin reporting the very same error, but with different symptoms.
And even more interestingly, bug 332050 is about a problem with bzr-gtk failing to work *the first time it is run* because of the seahorse D-Bus service. So that problem is not only with the gnome-system-tools.