BUG #1327: Compare column of varchar FAILURE!

The following bug has been logged online:

Bug reference:      1327
Logged by:          yychen

Email address:      yychen@mail.clhs.tyc.edu.tw

PostgreSQL version: 7.4.6

Operating system:   Fedora 3

Description:        Compare  column of varchar FAILURE!

Details: 

Client Charset zh_TW Big5
Server DataBase Encoding by EUC_TW
Connect via ODBC 7.3.1
Server OS:Fedora3

But in Linux 9 is correct!
Ex: 
  SELECT * FROM tablename WHERE Column_Of_Varchar='String_Of_Big5';

It will Return All data in tablename And no any error message!