dbus error when taking a screenshot

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https://bbs.archlinux.org – I can't take screenshots with the Gnome3 screenshot program. When I try to save a screenshot, I get this error message:Error while saving screenshot. Impossible to save the screenshot to file:///home/some/directory. Error was GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process /usr/bin/nautilus exited with status 1. Please choose another location and retry.I found a thread with a similar problem (dbus error when taking a screenshot; the error message is different though) providing a solution, but I can't try that solution because I don't have a /etc/X11/xorg.conf.d (HowTos)