"PostgreSQL Bugs List" <pgsql-bugs@postgresql.org> writes:
> then when inserting values it says á = é = à = ó = ú
> (confuses different acuted vowels as if they were the same thing)
Sounds to me like you have selected the wrong character set (encoding)
or wrong locale when installing the database. If Postgres thinks those
strings are equal, it is because the strcoll() library routine says so.
You need to pick a locale that will behave the way you want.
regards, tom lane