[Users] How to correctly render non-ASCII subject lines?

[jdebert]

Just started using claws-mail 3.9.2.
(opensuse claws-mail-3.9.2-2.4.1.i586)

All non-ASCII subjects are not properly rendered and are unreadable,
thus:
 [opensuse-ja] OpenSUSE13.1 x86_64 $B$N%$%s%9%H!<%i!<%P%0(B$B!)(B

I found no option or function on claws-mail to solve this.

What can be done to correctly render the subjects?

Also, sometimes the Sender and From headers are the same.

Thank you,

jd