Since a few weeks (after a distribution upgrade), about every program with a graphical user interfaces crashes at some point with the same error:
GLib-GIO-ERROR **: Settings schema 'org.gtk.Settings.FileChooser' does not contain a key named 'last-folder-uri'
It happens about every time a file open dialog shows up, but also when the network manager asks for a WiFi password. (Which means I can't open files in any gtk application and only connect to open wireless networks.)
/usr/share/glib-2.0/schemas/org.gtk.Settings.FileChooser.gschema.xml does contain
<key name='last-folder-uri'... etc. Running
glib-compile-schemas doesn't seem to help.
It's not just for one user. If I log in as a guest ('Guest Session'), the same happens.
$ dpkg -s libgtk-3-common | grep Version Version: 3.4.2-0ubuntu0.3