I have just received Mark III last night, did some test shoots today. After about 50 shuttters, I had error problems. First it was ERR-02, [Card not formatted. Format card with this camera] I have problems reformatting my San Disk II CF card. I tried shooting again with Lexar and I had the same error appearing and unable to reformat the card. The CF cards worked perfectly fine in 30D. I swithced the camera off, removed the cards, removed the battery, did a reset but I still have the same ERR-02. I wonder why? Without CF card, I tried to shoot again but this time I had ERR-01 [Communications betwwen the camera and lens is faulty. Clean the lens contacts] I was using 24-70mm L 2.8, cleaned the contacts, reset the camera but the error was still there. Fustrated, I tried attaching 20mm 2.8 and 50mm 1.4, but　 I still have the same error appearing! I will bring the camera to Canon tomorrow. Was wondering if any people out there have the same problems that I am facing? I am in great dilema. After months of waiting for Mark III, I was　looking forward to use it for tomorrow's shoot,I have to send it back to Canon! Sigh~~"