Can't filtering mail subject if in Chinese format.

[David Chang]

My imp can not filtering the mail whose subject in
Chinese format.

David Chang. 
===========
Envirmnent:
===========
Linux RedHat 6.0 with kernel 2.2.15 + Apache 1.3.20 +
Mysql 3.23.41 + PHP 4.07 DEV

PHP Support:
============
FTP Support: Yes 
Gettext Support: Yes 
IMAP Support: Yes 
LDAP Support: Yes 
MCAL Support: Yes 
Mcrypt Support: No 
MySQL Support: Yes 
PostgreSQL Support: No 
XML Support: Yes 

Horde Versions
================
Horde: 1.3.5-cvs 
IMP: 2.3.7-cvs 
Turba: 0.0.3-cvs 
Gollem: 0.0.1-cvs 
Nic: 0.0.2-cvs 
Kronolith: 0.0.3-cvs 
Jonah: 0.0.3-cvs 
Whups: 0.0.1-cvs 
Nag: 0.0.2-cvs


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