hey .. i have installed ML the latest build for the 5dmkIII running 1.2.3 .. there was no problem so far ... i did some raw recording etc .. but i came to format card remove the bootflag , so i did it .. now i have trouble that the camera wont boot from time to time after removing the ML firmware ... i can get it running by removing battery , cards etc switching on/off.. and than i get a startup .. i updated over the 1.2.3 .. with no sucsess... it seems that after a time the camera seems to go in a freeze .... i can turn off/on with sucsess when i do it in short time .. if i leave the camera with battery cards off for let say an hour it wont boot into orginal state .. any idea ?? thx !!