http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=314&modelid=17662

Firmware Update Version 1.0.7 improves and mitigates the following two types of image quality phenomena that occur under certain shooting conditions.

1. "Black dot" phenomenon (the right side of point light sources become black)
2. Vertical banding noise

Firmware Version 1.0.7 is for EOS 5D Mark II cameras with firmware up to version 1.0.6. If the camera's firmware is already version 1.0.7, it is not necessary to update the firmware.

Note:
When updating to Firmware Version 1.0.7, please also update the Digital Photo Professional and Picture Style Editor software, which can be downloaded from Drivers/Software Selection.

Caution:
A power failure during the firmware writing operation may disable the camera.
- Use a fully charged Battery Pack or dedicated AC Adapter Kit (Optional) ACK-E6
for the firmware update.
- Do not shut off the power during the firmware writing operation.
- Do not open the CF card slot cover during the firmware writing operation.
- Do not press any camera buttons during the firmware writing operation.

有機器的一起來試看看巴