6:03 mrpouit@pegasus ~% echo $XDG_DATA_DIRS /etc/xdg/xubuntu:/usr/local/share/:/usr/share/:/usr/share/gdm/:/usr/share
Fixed in hardy.
6:03 mrpouit@pegasus ~% echo $XDG_DATA_DIRS xubuntu: /usr/local/ share/: /usr/share/ :/usr/share/ gdm/:/usr/ share
/etc/xdg/
Fixed in hardy.