This problem also exists on Kubuntu 14.0.4.5 running Dropbox 3.18.1.
dropbox stop && DBUS_SESSION_BUS_ADDRESS="" dropbox start
makes it work again.
This problem also exists on Kubuntu 14.0.4.5 running Dropbox 3.18.1.
dropbox stop && DBUS_SESSION_ BUS_ADDRESS= "" dropbox start
makes it work again.