I presume it's a dust blob I'm looking at ( soft green circle in black scenes) but on a white background in the same spot it comes up red but smaller and in focus. the strange thing is it coincided exactly with me noticeing a green pixel a few inches beside it. coincidence? My question is has anyone blasted away any dust blobs from their 700 yet and can it be done through the filter opening or does the top have to come off. p.s. very happy with pj and vb not a problem. thanks.