DSLRUsers.com

CNet wrote:In an unusual move, Canon released a firmware upgrade for its high-end EOS 5D Mark II camera that substantially expands its video capability nearly a year and a half after the SLR was released.

Customers of the $2,500 camera had sought more flexibility in the 1080p video frame rates to better match their medium of production. The camera initially only supported 30 frames per second, but the firmware 2.0.3 update changes that to 29.97fps "to comply with TV production standards," adds a 23.976fps option for those in the cinema world, and for those who set the camera to use the European PAL video standard, there's also a 25fps option. (As is common, the terminology on the camera itself is rounded up to 30fps and 24fps.)

Canon wrote:We are now introducing the Version 2.0.4 firmware. This firmware corrects the malfunction that occurred in the previous Version 2.0.3 firmware, in which the manual recording level changed and made recording impossible.

Customers who have the Version 2.0.3 firmware on their cameras should update the firmware to Version 2.0.4.