To Bill. I dont no if any one else has had this problem. when you have the preview window open and viewing as audience scan and smoke enhancement on that you get a pulse problem on the out-put from the card(using diode lasers)put the mouse arrow over the pre-view window and watch it flicker, when you shut down window it disapears on the out put from the laser. i thought i was having problems with lasers but have tracked it back to the preview window. is this just my card or have other people experienced this?