This might sound stupid but maybe someone can help me out: I shoot with a 7D and in RAW and even in broad daylight the pictures suffer from quite a lot of banding. I use NIK Dfine 2.0 in Photoshop CS6 to clean up noise and banding. The debanding produces strange spiky artifacts around edges though (see pictures below). Does anyone know how to avoid those or how to get rid of them?