There have been complaints about sound handling capabilities of the EF Black Magic Cinema Camera. In the recent firmware release 1.3, there is discussion on the Black Magic forum of changes in the sound handling too. This was not documented by Black Magic upon release of the camera. See this discussion:

Blackmagic Forum • View topic - Firmware 1.3 better audio performance (http://forum.blackmagicdesign.com/viewtopic.php?f=2&t=7498&p=48042#p48042)

Good to know. Thanks for posting this here.