From Canon USA:
Canon has released a firmware update for the EOS 7D digital SLR camera.
Firmware Version 2.0.5 incorporates the following fix:
Firmware Version 2.0.5 is for cameras with firmware version 2.0.3. If the camera's firmware is already Version 2.0.5, it is not necessary to update the firmware. Once the camera is updated to version 2.0.5, it cannot be restored to a previous firmware version.
When updating the firmware of your camera, please first review the instructions thoroughly before you download the firmware.
When the camera is updated to Firmware Version 2.0.5, the following settings will be automatically reset.
a) Date/Time setting
b) Lens peripheral illumination correction data registered to the camera
The Wireless File Transmitter WFT-E5A must be running Firmware Version 1.0.7 in order to be used with the EOS 7D camera running Firmware Version 2.0.5.
Some older versions of the applications listed below do not support functions that are added by the new firmware. In order to address compatibility issues, please download the latest versions of the applications (listed below) from our Web site. For the latest operating system requirement information please visit the Canon website.
EOS Utility Version 2.13.25 or later Supported OSes:
Windows (XP SP3/Vista SP2/7/7 SP1/8), Mac OS X (v10.6.8/10.7/10.8)
Digital Photo Professional Version 3.13.45 or later
Supported OSes: Windows (XP SP3/Vista SP2/7/7 SP1/8), Mac OS X (v10.6/10.7/10.8)
ImageBrowser EX Version 1.0.1 or later
Supported OSes: Windows (XP SP3/Vista SP2/7/7 SP1/8/8.1), Mac OS X (v10.6.8/10.7/10.8)
Please download the most recent Instruction Manual if the firmware of your camera is being updated from firmware version 1.25 or earlier. The Instruction Manual has been revised accompanying the improvements and additions of functions provided in these previous firmware versions.