Canon 5D Mark II Firmware Update 2.0.4
That was fast. Here is the apology from Canon for the bunk 2.0.3 firmware upgrade.
“We apologize sincerely for the inconvenience caused to our customers by suspending the availability of the Version 2.0.3 firmware.
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.”