7.1 euro-style dates insert error

7.0.x okay, 7.1 incorrect (CVS from 24th April):

create table test(aaa date);
insert into test(aaa) values ('23.10.1997');
insert into test(aaa) values ('13.10.1997');
insert into test(aaa) values ('2.10.1997');
select * from test;

gives:

    a
--------
1997-10-23
1997-10-13
1997-2-10

Automatically thinks that the last value is a US style date.
Date style is set to EURO, but I assume this has no affect on the date
parsing at insert time.
If the dates are entered as 'ccyy.mm.dd' it is okay - unfortunately all my
dates are in the format 'dd.mm.ccyy'.

Is this a bug or a user error?

Thanks,
Chris