Chinese characters in an English subject line

I have a user who sends internet e-mail in English and sometimes her subject
line changes to Chinese characters. When I check the Options I get the
following:

MIME-Version: 1.0
Content-Type: application/ms-tnef;
name="winmail.dat"
Content-Transfer-Encoding: binary
Subject: =?iso-2022-jp?B?Rlc6IBskQkB1XEAbKEJs?=


I had her foward me the message from her Sent Mail and again checked the
options and get the following:

Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: application/ms-tnef;
name="winmail.dat"
Content-Transfer-Encoding: binary
Subject: FW: Email


I don't believe it is a server issue as it is only happening to one user. I
sent a test e-mail to the external address and it showed up fine. I'm
thinking it is something my user has chagned in her settings. I've had her
compare the settings to mine and they look fine, but I don't know where else
to look.

Any help is appreciated

G