I've had a bunch of problems with my 5D as great a camera as it is. I've had diagonal interference banding of some kind. It seems the 5D is susceptible to certain radio frequencies. It seems it is exacerbated by proximity to typical mercury-vapor street lamps. I've already spoken with Canon CPS and they had no real answer for me. I've also had problems getting info into the blue channel at night without overblowing my other channels. It's a fantastic camera but I'm looking for something better for night shooting!