7D firmware update to 1.2.3 released
Canon also put out a 7D firmware update V1.2.3. Get the update here
No new features, but bug fixes which include :
Firmware version 1.2.3 is for cameras with firmware up to Version 1.2.2. If the camera's firmware is already Version 1.2.3, it is not necessary to update the firmware.
Addition:
Note that cameras with the version 1.2.3 firmware (and also versions 1.2.0 through 1.2.2) cannot be downgraded to a previous firmware version (such as version 1.1.0 or earlier).
Note that cameras with the version 1.2.3 firmware (and also versions 1.2.0 through 1.2.2) cannot be downgraded to a previous firmware version (such as version 1.1.0 or earlier).
For details on Firmware Version 1.2.3, please download the PDF files from the bottom of this page.