Yeah… Another Canon EOS 5D Mark II Firmware is out. Now is version 2.0.4. Basically, it fixes following phenomena that occurred with the Version 2.0.3 firmware (which was to enhance the movie functions) have been corrected. * There was a phenomenon in which the manual recording settings made in C1/C2/C3 were changed and sound could not be recorded if manual sound recording was used in the C1/C2/C3 settings and the camera was subsequently turned off (or if Auto Power Off was activated). This does not occur in modes other than C1/C2/C3.

Download Canon EOS 5D Mark II Firmware v2.0.4 for Windows here and Mac OS X here. And the Firmware Update Procedures here.