Under Japanese environment, email with Japanese in the subject header or in the sender's name doesn't get displayed correctly in the message index. Works fine in the message display area. Maybe a font problem for the message index?
Japanese in the Date column comes out correctly. Not a font prob I guess. But definite problems with Japanese in the Subject and Sender columns.
*** Bug 16030 has been marked as a duplicate of this bug. ***
This will not be fixed unless netscape fixes it upstream.