Regression Testing on REL6_5_PATCHES

I have hit an unexpected error in regression testing the REL6_5_PATCHES branch
in preparing for 6.5.3.  For the first time, a test other than float or
geometry failed -- with a weird result.  Datetime failed.  Here is the section
of regression.diffs for datetime:
----------------------------
*** expected/datetime.out    Wed Apr 14 22:19:01 1999
--- results/datetime.out    Mon Nov  1 22:40:45 1999
***************
*** 1,7 **** QUERY: SELECT ('today'::datetime = ('yesterday'::datetime + '1 day'::timespan)) as "True"; True ----
! t    (1 row)  QUERY: SELECT ('today'::datetime = ('tomorrow'::datetime - '1 day'::timespan)) as "True";
--- 1,7 ---- QUERY: SELECT ('today'::datetime = ('yesterday'::datetime + '1 day'::timespan)) as "True"; True ----
! f    (1 row)  QUERY: SELECT ('today'::datetime = ('tomorrow'::datetime - '1 day'::timespan)) as "True";
***************
*** 13,19 **** QUERY: SELECT ('tomorrow'::datetime = ('yesterday'::datetime + '2 days'::timespan)) as "True"; True
----
! t    (1 row)  QUERY: SELECT ('current'::datetime = 'now'::datetime) as "True";
--- 13,19 ---- QUERY: SELECT ('tomorrow'::datetime = ('yesterday'::datetime + '2 days'::timespan)) as "True"; True
----
! f    (1 row)  QUERY: SELECT ('current'::datetime = 'now'::datetime) as "True";
***************
*** 69,75 **** QUERY: SELECT count(*) AS one FROM DATETIME_TBL WHERE d1 = 'today'::datetime - '1 day'::timespan; one
---
!   1 (1 row)  QUERY: SELECT count(*) AS one FROM DATETIME_TBL WHERE d1 = 'now'::datetime;
--- 69,75 ---- QUERY: SELECT count(*) AS one FROM DATETIME_TBL WHERE d1 = 'today'::datetime - '1 day'::timespan; one
---
!   0 (1 row)  QUERY: SELECT count(*) AS one FROM DATETIME_TBL WHERE d1 = 'now'::datetime;

-------------------------------
Misc also failed -- but that was due to the pgaccess relations from my pgaccess
testing.

System: RedHat Linux 6.1 -- kernel 2.2.12 w/ glibc 2.1.2.
--
Lamar Owen
WGCR Internet Radio
1 Peter 4:11