Update: To get gnome-control-center starting again, this seems to help: dconf reset -f /org/gnome/control-center/
But once as I click "Details" again, it starts crashing again and again, until I dconf reset again. I found this hint from: https://bbs.archlinux.org/viewtopic.php?id=244792; They seems to suspect that glib2 causes the problem. I'll try to downgrade it to see if there is something to it, as glib2.0 has been updated 3 days ago. -- tobi