Run time difference on jobs creaed prior to 11/6/2011 EST and post date.

Question

Hi,
I have a DBMS_SCHEDULER job created prior to 11/6/2011 with repeat interval. After 11/6/2011(Daylight savings change) I observed the jobs are running 1hr earlier than the time specified. They don't seem to be following the current time of database. My sysdate shows correct time. How do I enforce the schedule to follow sysdate time with Daylight savings enabled.
DBMS_SCHEDULER.create_schedule (
schedule_name => 'SCH_Holidays',
repeat_interval => 'FREQ=YEARLY;BYDATE=20110101,20111104,20111107;',
comments => 'Static Holidays'
BEGIN
DBMS_SCHEDULER.create_job (     
job_name => 'EMAIL_REPEAT',
job_type => 'PLSQL_BLOCK',
job_action => 'BEGIN
NULL;
END;',
start_date => SYSTIMESTAMP,
repeat_interval => 'freq=DAILY; BYDAY=MON,TUE,WED,THU,FRI; BYHOUR=2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20; BYMINUTE=0,15,30,45; EXCLUDE=SCH_Holidays;',
enabled => TRUE,
comments => 'EMAIL REPEAT JOB EVERY 15 min Starting from 2:00 till 20:00'
END;
select LOG_DATE,JOB_NAME from dba_scheduler_job_run_details where LOG_DATE >trunc(sysdate-3) and JOB_NAME='EMAIL_REPEAT'
LOG_DATE JOB_NAME
04-NOV-11 02.00.46.853302 AM -04:00 EMAIL_REPEAT
07-NOV-11 01.00.52.908917 AM -05:00 EMAIL_REPEAT

Answer 1

On our database here is the output of what patches are applied. Does any of the patches not applied contributing to this behaviour ?
V3 (or later) Time Zone Update is applied
V4 (or later) Time Zone Update is applied
V6 tzdata2007f (or later) Time Zone Update is not applied
V7 tzdata2007k (or later) Time Zone Update is not applied
V9 tzdata2008f (or later) Time Zone Update is not applied
V10 tzdata2008i (or later) Time Zone Update is not applied
V11 tzdata2009g (or later) Time Zone Update is not applied
V13 tzdata2009s (or later) Time Zone Update is not applied
V14 tzdata2010i (or later) Time Zone Update is not applied
V15 tzdata2010o (or later) Time Zone Update is not applied
V16 tzdata2011g (or later) Time Zone Update is not applied