Similar to previous cronie changes, so far 'at' environment is also not complete and only root user could trigger delayed tasks. Similar permission changes are required for: /etc/at.deny /usr/bin/at /var/spool/at/
fixed by: http://git.pokylinux.org/cgit/cgit.cgi/poky/commit/?id=ab3161839a082547f64093eaf8a1e2d48db840e5
verified