For what it's worth we're having the same problem at Brandeis University and when we change our system date AOLServer works fine.
I even brought up a vanilla version of aolServer 3.3.1+ad13 no ACS. All I'm doing is loading a page that schedules a number of procedures (ns_log's) and depending on the date they would stop firing.
if anyone has any insight it would be greatly appreaciated.
