Hi, I was wondering if anyone else has had similar problems to me regarding DUST BLOBS. These are only apparent on dark scenes ( which is still very annoying ). They change in size according to the focus, and changing the iris setting increases/decreases how bright they are. It I select an imput with no signal so that I get a blank screen, playing around with the focus shows loads of small green blobs across the screen. For my mind, it is obvious not the panels that have the dust, but further, in the lens. Anyone else had similar problems, and have any suggestions ??? I have tried the compressed air, and vacuuming around all the possible holes etc...No difference at all. Other than that, great projector, very pleased. ( while I'm here, any upgrade recommendations ???...if this is something I gota live with, i might be driven nuts !!) Many thanks!!