/usr/share/ is in thunar 1.6.3-1ubuntu5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xfce4/
/usr/share/xfce4/panel-plugins/
/usr/share/xfce4/panel-plugins/thunar-tpa.desktop
/usr/share/Thunar/
/usr/share/Thunar/sendto/
/usr/share/Thunar/sendto/thunar-sendto-email.desktop
/usr/share/applications/
/usr/share/applications/Thunar.desktop
/usr/share/applications/thunar-settings.desktop
/usr/share/applications/Thunar-folder-handler.desktop
/usr/share/applications/Thunar-bulk-rename.desktop
/usr/share/man/
/usr/share/man/man1/
/usr/share/man/man1/Thunar.1.gz
/usr/share/doc/
/usr/share/menu/
/usr/share/menu/thunar
/usr/share/man/man1/thunar.1.gz
/usr/share/doc/thunar