BUG #1721: mutiple bytes character string comaprison error

The following bug has been logged online:

Bug reference: 1721
Logged by: Chii-Tung Liu
Email address: cdliou(at)mail(dot)cyut(dot)edu(dot)tw
PostgreSQL version: 8.0.3
Operating system: Windows XP SP2
Description: mutiple bytes character string comaprison error
Details:

When compare two UTF-8 encoded string that contains Chinese words, the
result is always TRUE
1. create a database test with encoding set to unicode
CREATE DATABASE test
WITH OWNER = postgres
ENCODING = 'UNICODE'
TABLESPACE = pg_default;
2. insert data with Chinese words
INSERT into node set title='1 '

3. SELECT title from node where title > '1.1 '
would return '1 '

4. Both SELECT '1 ' > '1.1' and SELECT '1.1' > '1 ' return
FALSE