"Chii-Tung Liu" <cdliou(at)mail(dot)cyut(dot)edu(dot)tw> writes:
> PostgreSQL version: 8.0.3
> Operating system: Windows XP SP2
> When compare two UTF-8 encoded string that contains Chinese words, the
> result is always TRUE
Sorry, but UTF-8 encoding doesn't work properly on Windows (yet).
Use some other database encoding.
regards, tom lane