Bug in Enigmail prevents encryption for BCC recipients

On previous versions of Enigmail one could send an encrypted email to a set of Bcc recipients. Enigmail would ask if one wants to “Hide Bcc recipients” and then send the email encrypted to all of them without revealing to whom the email was sent. Such functionality is missing in version 1.7. Even when marked to be encrypted, an email with only Bcc recipients is sent in plain text!

Sourceforge: http://sourceforge.net/p/enigmail/bugs/294/

Sourceforge: http://sourceforge.net/p/enigmail/forum/support/thread/3e7268a4/

Heise: http://www.heise.de/open/meldung/Enigmail-verschickte-manche-Mails-unverschluesselt-2389248.html