Last weekend, our scheduler jobs under at command for user mgr are run under the old time, (jobs under cron are run at the good hour.)
# at -luser = mgr 1383673500.a Sun Nov 3 10:45:00 2013
user = mgr 1383672600.a Sun Nov 3 11:30:00 2013
jobs run at 09:45 and 10:30
SunOS pbspfox1 5.10 Generic_147440-12 sun4u sparc SUNW,SPARC-Enterprise
Could this be related to daylight savings time adjustments?