Further investigation reveals this is probably a duplicate of Bug #304345 - a bug in the GTK file chooser that prevents a string of applications to select samba shares.
Workaround: Browser to the desired location in Nautilus, then use the file chooser and go to {home directory}/.gvfs/{desired share}
Further investigation reveals this is probably a duplicate of Bug #304345 - a bug in the GTK file chooser that prevents a string of applications to select samba shares.
Workaround: Browser to the desired location in Nautilus, then use the file chooser and go to {home directory} /.gvfs/ {desired share}