I've just recently purchased on OM-D E-M1 On certain images like the one attached I'm seeing a small circle appear on plain backgrounds. In the image attached to this thread it appear above the red flower on the left hand side of the image. I've also had it on images with a clear sky. It doesn't appear to show up in other images with lots of detail in them. Any ideas what this could be. The problem happens on all three lenses that I've tried.