Important Update Information for Firmware Update Version 2.0.3
Thank you for using Canon products.
We have learned that some users of the Canon EOS 5D Mark II digital SLR camera are experiencing issues with Firmware Update Version 2.0.3.
We are working on a new firmware update to address these phenomena, which will be available soon. If you have not registered your EOS 5D Mark II, please register so we will be able to notify you via e-mail when future firmware updates become available for download.
Canon always strives to provide the highest quality products to our customers. We sincerely apologize for any inconvenience these phenomena may have caused. We appreciate your kind patronage and support.
Some of the complaints
“No audio in C modes unless I set my audio levels in one of the “creative” modes (M, Av, Tv, ) first and then go into my C mode of choice. Kinda defeats the purpose of having a C mode if I have to go to another mode first…”
“I have found the same thing. It only seems to work if you move from one of the other creative modes to a Custom mode. If you turn the camera OFF, then go to a Custom mode, turn the camera back ON, and then try to record Manual audio, you will get signal levels on your meters, but no audio is recorded.”
From 5D Mark II Team: http://5dmark2.wordpress.com/