Select gives the wrong results

Dear all:

I am fairly knowledgeable about PostgreSQL but this behaviour is
stumping me. Any help would be wonderful. If you think it is a bug, let
me now and I'll file one.

(select values in DB (date stamps) between Jan 1, 2000 and Jan 1, 2005,
no results)

db_name=# SELECT * from person_detail WHERE field='2' AND
value>'946702800' AND value<'1104555600';
id | person | field | value
----+--------+-------+-------
(0 rows)

(select values in DB (date stamps) between Jan 1, 2003 and Jan 1, 2005, 4
results (!))

db_name=# SELECT * from person_detail WHERE field='2' AND
value>'1041397200' AND value<'1104555600';
id | person | field | value
------+--------+-------+------------
1187 | 454 | 2 | 1051156800
1188 | 460 | 2 | 1053316800
1219 | 472 | 2 | 1057723200
1181 | 441 | 2 | 1042520400
(4 rows)

The first select should have those 4 results plus any more. We tried
putting quotes (") around the word 'value' to see if that made a
difference, and no it didn't. We tried reversing the two clauses and
that made no difference.

Here's another funny one. Not the one that doesn't belong.

db_name=# SELECT * from person_detail WHERE field='2' AND
value>='1000000001' AND value<='1104555600';
id | person | field | value
------+--------+-------+------------
3 | 218 | 2 | 1017464400
253 | 295 | 2 | 1002340800
514 | 323 | 2 | 100155600
1126 | 405 | 2 | 1006750800
1179 | 439 | 2 | 1035172800
1187 | 454 | 2 | 1051156800
1188 | 460 | 2 | 1053316800
1219 | 472 | 2 | 1057723200
1181 | 441 | 2 | 1042520400
1152 | 434 | 2 | 1032321600
1129 | 410 | 2 | 1024027200
(11 rows)

Anyone see what's going on here?

Thanks!
Crystle

--
Crystle Numan, B.Sc., Web Developer
Guided Vision: the possibilities are endless
905.528.3095 http://guidedvision.com