Puntuado con 5 de 5 estrellas

Perfect! Now "Default subject" works with Cyrillic! Thank you for immediate response!

Esta valoración es de una versión anterior del complemento (0.2.2). 

Puntuado con 5 de 5 estrellas

A very useful add-on, indeed. It should be embedded into Thunderbird. One drawback: when I use the option "Insert automatically default subject" with default subject in Cyrillic, the result is unexpected. Encoding should be corrected.

Esta valoración es de una versión anterior del complemento (0.2.1). 

Thanks for review and bug report: i haven't checked this last time... sorry. I'm currently fixing it. New version will come very soon. Regards,
EDIT: this bug has been fixed in v0.2.2.