A relative of mine encountered this weird artefacts in her photos. Below a large part of the upper half of the photo (original was 4MPixel, it's a not-too-new point&shoot olympus camera). There is one large disk, surrounded by three very small. Right top is another one. In the window is another one, and a bit lower (just outside this crop) in the window is a "duplicate" of the large disk. Is it possible that this is lens flare?? I did some filtering (photoshop) on the large disk, giving the following: Note that it is perfectly round and I don't see any other artefacts as lines, which would be commonly encountered with this kind of bright lens flare, if it is lens flare. All lights in the room were dimmed, only the flash was a bright light source.