Comment 1 for bug 1061693

Here are some thoughts I had to fix this. It is not fully realized:

We take advantage of tunables in the following manner:
 * create tunables/xdg to have:
    @{XDG_DESKTOP_DIR}=@{HOMEDIRS}/*/Desktop
    #include <tunables/xdg.d>
 * tunables/xdg.d could include files with contents of the form:
    @{XDG_DESKTOP_DIR}+=@{HOMEDIRS}/*/TranslatedDesktop
 * we could then have some sort of a hook, perhaps a dpkg trigger that would generate files in tunables/xdg.d based on installed locales

Rules that were of the form of:
owner @{HOME}/Desktop/** r,

would become:
owner @{XDG_DESKTOP_DIR/** r,

This also has the advantage of opening the possibility of handling migrations like those with /var/run/user/ to be handled more gracefully.