Problem with encoding in email subject

Hello,

I send email in Adobe CQ5 under articles:

http://labs.sixdimensions.com/blog/2012-08-20/sending-email-adobe-cq-api/

But I have this problem:

I have problem with subject encoding. Subject contains this characters "žščěř" and they are shown this - "?" I try to set encoding "email.setCharset("UTF-8");" - in content (email body) is everything OK, in subject it isn't OK. Template is defined as:

From: email@email.cz
Subject: žščěř

žščěř

The man, who write the article said, that it could be bug in Adobe CQ5.

Could you help me?

Thanks.

Jan