Email class: BCC not working

[eluser]goodbytes[/eluser]
I'm using the standard code igniter email class to send out emails.
$this->email->to() is working fine, but $this->email->bcc() isn't working.

To put it short, the emails are sent out fine, but only to the "to" address and not to the "bcc" addresses.
This is a post from 2011, where people had the exact same problem, but no solution: http://ellislab.com/forums/viewthread/147797/