My friend just bought a G5 (at my recommendation) and sent me the attached image (originally RAW) which I then converted to JPG in LR 4.3 with default settings. ISO 1600 1/1600 f/1.8 Olympus 45mm 1.8 Only information I have as of now is that she has this issue with both the Oly 45 lens and the 14-42 Pana kit lens. She's obviously trying to test the high ISO performance of the camera given such a high shutter speed. I've read a lot of about high ISO banding with the OM-D, but rarely anything at all regarding the G5. I'm wondering if this is a combination of high ISO, florescent lighting (still need to confirm) and a high shutter speed. She's afraid the camera has a bad sensor. What do you think this is caused by? Thanks.