Hola,
Ha aparecido un nuevo firmware para la Mark III que parece que soluciona algunos problemillas
This firmware update (Version 1.1.3) incorporates the following improvements and fixes.
Increases transmission speed when using high-speed SD cards.
Fixes a phenomenon involving not being able to release the shutter.
Improves AF tracking in specific conditions.
Corrects errors in the Spanish and Korean menu screens.
http://web.canon.jp/imaging/eos1dm3/firmware.htmlLo que me ha gustado es la frase de la web:
The Version 1.1.3 firmware being released this time is for cameras with firmware up to Version 1.1.1. If the camera's firmware is already Version 1.1.3, it is not necessary to update the firmware.
saludos