String operators <= and >=

Hi

We have a strange problem when searching for a string using <= and >=
operators on Solaris.
It did work with 7.3, but not with 7.3.3, 7.3.4 and 7.4.1.
The database have been initialized with locale en_US.ISO8859-1

Have a simple table testtbl:
create table testtbl ( id int, name varchar(20));
Insert this record:
insert into testtbl values(10, 'PEREZ');
Now do that search:
select * from testtbl where name >= 'PERE' and name <= 'PERE\377';

It should return the record of the table, but it will not return it with
version 7.3.3 and later.
We still found that workaround works:
select * from testtbl where name >= 'PERE' and name <= 'PEREzz';

Which is pretty strange...
Any comments about that? Is it a bug?

Thanks,
Patrick

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