strange behvaviour in join? BUG in 7.02?

I have PSQL 7.02

classic join on Two tables:

select l.id from linia l,lk_strefa2linia lk
where l.id = lk.fk_linia and lk.fk_strefa=5;

gives correct linia.ids.

but
select linia.id from linia l,lk_strefa2linia lk
where l.id = lk.fk_linia and lk.fk_strefa=5;

(the only difference is second word: linia.id instead l.id)
will give totaly different results).

tables definitions:

mlotdev=> \d lk_strefa2linia
    Table "lk_strefa2linia"
 Attribute |  Type   | Modifier
-----------+---------+----------
 fk_strefa | integer | not null
 fk_linia  | integer | not null
Index: lk_strefa2linia_ukey

mlotdev=> \d linia
                             Table "linia"
 Attribute |    Type     |                  Modifier
-----------+-------------+---------------------------------------------
 id        | integer     | not null default nextval('seq_linia'::text)
 fk_typ    | integer     | not null
 numer     | char(10)    | not null
 status    | char(1)     | not null default '?'
 stamp     | timestamp   | not null default now()
 opis      | varchar(64) | not null
 skrot     | varchar(16) | not null
Index: linia_pkey


Please CC answer to me. Thanx!

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