Date input changed in 7.4 ?

Hi all,
I noticed that some date are not anymore accepted:


Postgres 7.3.3:

test=# select '18/03/71'::date;   date    
------------1971-03-18
(1 row)


Postgres 7.4beta1:

test=# select '18/03/71'::date;
ERROR:  invalid input syntax for date: "18/03/71"


is this the indendeed behaviour ?

Regards
Gaetano