The new 5D2 firmware has been taken down after it broke the cameras it was suppose to update. This is for all of you who cry about Nikon not keeping up with canon firmware, and manual control, and 1080p and, blah, blah, blah. Oh and for all of you who want Nikon to do open source software. All it takes is for one poorly written app to turn you D4 into a brick. No thanks.
Epic Firmware Fail!
http://web.canon.jp/imaging/eosd/firm-e/eos5dmk2/firmware.html