All right just for the record I've isolated it to an OS level issue. I even became the apache user and executed the spool file from /var/spool/at and it worked! But in root's mail I'm getting (consistently when the job is run): 
This account is currently not available.

[download]
Now I may not understand exactly what that means, but it seems reasonable to believe that that's the barrier I'm running up against. I do appreciate y'alls input, and I learned a few things so your time was not wasted :-)

In reply to Re^4: executing "at" from perl by rastoboy
in thread executing "at" from perl by rastoboy

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