I've just purchased a new Panasonic GH2 and I'm still getting used to it. I've have several occasions where I'm seeing a strange behavior and I'm not sure if it is me or the camera or some combinations of settings. Perhaps someone with more experience with the camera can chime in. Occasionally, after I've been shooting and the camera has been inactive, but not shut off or in sleep mode, when I depress the shutter, the auto focus does not work. The camera will take a photo (still) but it is out of focus. Moving the focus mode selector from AFS to manual and back seems to clear the problem. I've seen this at least twice now. Today I saw a slightly different problem. I went to shoot and the focus frame box was red, which I've not seen before. As with the other symptom, the camera would not focus. Again, I cycled the focus switch and the problem cleared. Otherwise the camera seems to be focusing and functioning correctly. Any ideas?