trigger problem?

I'm using the fti function that is included with the source, and seem to
have run into a problem with the trigger call.

I have a full text index with only around 556645 entries.  I then have a few
triggers defined on each of the fields I'm indexing (see end of email for
part of the scheme dump).  When I create a new entry with insert, everything
is fine.  However, if I then go back and do an update, things don't go so
well.

Here's a transcript where 3 fields are filled out with the text 'asdfghjkl',
'krell', and 'bryston':

kb=> select * from article_fti where id = '2570499';
string   |     id
---------+-------
kl       |2570499
jkl      |2570499
hjkl     |2570499
ghjkl    |2570499
fghjkl   |2570499
dfghjkl  |2570499
sdfghjkl |2570499
asdfghjkl|2570499
ll       |2570499
ell      |2570499
rell     |2570499
krell    |2570499
on       |2570499
ton      |2570499
ston     |2570499
yston    |2570499
ryston   |2570499
bryston  |2570499
(18 rows)

kb=> update article_entry set keywords = 'testing keywords' where aid = 688;
UPDATE 1
kb=> select * from article_fti where id = '2570499';
string |     id
-------+-------
on     |2570499
ton    |2570499
ston   |2570499
yston  |2570499
ryston |2570499
bryston|2570499
(6 rows)

All of a sudden, only one of the fields is getting indexed!  In fact, it's
the first one that the trigger is defined on.  Am I just not understanding
triggers here?

We are running postgresql-6.5.3-1 on a 2.2.12-20smp linux box.

thanks for the help,
Oren Teich
--------------------------


CREATE TRIGGER "article_fti_trigger_question"
AFTER INSERT OR DELETE OR UPDATE
ON "article_entry"
FOR EACH ROW EXECUTE PROCEDURE fti ('article_fti', 'question');

CREATE TRIGGER "article_fti_trigger_response"
AFTER INSERT OR DELETE OR UPDATE
ON "article_entry"
FOR EACH ROW EXECUTE PROCEDURE fti ('article_fti', 'response');

CREATE TRIGGER "article_fti_trigger_comment"
AFTER INSERT OR DELETE OR UPDATE
ON "article_entry"
FOR EACH ROW EXECUTE PROCEDURE fti ('article_fti', 'comments');

CREATE TRIGGER "article_fti_trigger_keywords"
AFTER INSERT OR DELETE OR UPDATE
ON "article_entry"
FOR EACH ROW EXECUTE PROCEDURE fti ('article_fti', 'keywords');