hello to all on afterdawn. i would olike to give my thanks to everyone that posts here. alot of your answers have helped me out alot. recently i have been encoding my movies with newest dvd rebuilder pro and newest HC Enc. the last 3 movies i did all the came out with blocks in the movie. u know those lil squares that r in the lighting and darknes of the movie. i have been encoding them on my vista ultimate 64bit. settings r highest encode quality in HC with bias of 23 and 2 pass encoding. my question is, is this a known compatibility issue with HC and vista?