BUG #2224: unlogical syntax error

The following bug has been logged online:

Bug reference: 2224
Logged by: Herv Hnoch
Email address: h(dot)henoch(at)isc84(dot)org
PostgreSQL version: 8.1.2
Operating system: Linux FC4
Description: unlogical syntax error
Details:

I do this request :

select id_caisse as caisse from adm_pat where nip = '20020523' ;

Under PgAdmin this request work fine but via JDBC I have the following
messages server side :

CETLOG: statement: PREPARE <unnamed> AS SELECT id_caisse AS caisse FROM
adm_pat WHERE nip = '20020523'

CETLOG: statement: EXECUTE <unnamed> [PREPARE: SELECT id_caisse AS caisse
FROM adm_pat WHERE nip = '20020523']

CETLOG: statement: PREPARE <unnamed> AS SELECT adm_pat."nip", id_caisse
caisse FROM adm_pat WHERE nip = '20020523'

CETERROR: syntax error at or near "caisse" at character 33

CETLOG: statement: PREPARE <unnamed> AS SELECT id_caisse AS caisse FROM
adm_pat WHERE nip = '20020523'

CETLOG: statement: EXECUTE <unnamed> [PREPARE: SELECT id_caisse AS caisse
FROM adm_pat WHERE nip = '20020523']

The table adm_pat does not have another column named caisse. So what is the
problem (if problem).

Thanks a lot.