Canon has just released Firmware Version 1.2.4 for the 21.1-megapixel full frame EOS 5D Mark II DSLR and its available now for download.
The new firmware adds the following enhancements:
1. Supports the WFT-E4 II wireless file transmitter that was released in December 2009.
2. Corrects a phenomenon in which visible noise may appear in images taken by continuous Bulb shooting.
Firmware Version 1.2.4 is for cameras with firmware up to version 1.1.0. If the camera’s firmware is already version 1.2.4, it is not necessary to update the firmware
[Site: Canon Japan]