Comment 4 for bug 978259

It is gdm's fault. It seems to be gdm-simple-slave's fault via the code below. If you comment out the code below, it works as expected.

daemon/gdm-session-direct.c:

        /* FIXME: We do this here and in the session worker. We should consolidate
         * somehow.
         */

        gdm_session_direct_set_environment_variable (session,
                                                     "PATH",
                                                     strcmp (BINDIR, "/usr/bin") == 0?
                                                     GDM_SESSION_DEFAULT_PATH :
                                                     BINDIR ":" GDM_SESSION_DEFAULT_PATH);