The at install scripts use "chown user.group" syntax, which doesn't work in coreutils-5.2.0-4. They need to use a colon instead.
*** This bug has been marked as a duplicate of 116536 ***
Fwiw this was already changed in pkg cvs, so it will change anyway the next time a newer at gets built.
Changed to 'CLOSED' state since 'RESOLVED' has been deprecated.