atd: Authentication service cannot retrieve authentication info.

[David L. Crow]

Ever since at-3.1.8-64_FC3 was installed on my machine, at jobs are
failing.  For each at job that is supposed to run, two messages are
placed in /var/log/cron:

   Mar  2 14:00:16 waterloo atd[20772]: Authentication service cannot
retrieve authentication info.
   Mar  2 14:00:16 waterloo atd[20771]: Authentication service cannot
retrieve authentication info.

This message is coming from PAM, but I don't know how to determine which
authentication service is mis-configured or broken.

I tried removing /etc/pam.d/atd (it is a new file in this release of the
at RPM), but get the messages in /var/log/cron:

   Mar  2 14:02:39 waterloo atd[21063]: User account has expired
   Mar  2 14:02:39 waterloo atd[21062]: User account has expired

I looked in Bugzilla, but there are not *any* bugs registered to the at
component for Fedora Core fc3.

Any pointers or help in trying to determine the cause would be much
appreciated.
-- 
  David L. Crow                     Texas!  It's like a
  crow at OrangeBlood.org              whole other country.