I have just received my Sony HS20, after deliberating for several months. To my horror, as soon as the projector was powered up, I noticed a bright green blob on the bottom right hand side of the screen, indicating dust! It is possible to focus on this, and it clearly shows a tiny hair like piece of dust. Does this indicate that the dust is on an LCD panel, or somewhere within the optics? Is there anything I can do to remove it, as there are no dead pixels and colour uniformity is fantastic, or should I return it to the company I purchased it from? Thanks for any advice. Steve.