I've been using my new Jaton region free dvd player for a few weeks now and i've noticed alot of jittering or jumpiness when I play any of my PAL dvd's on my NTSC television. In other words the picture is not steady. Is there a setting I can change to make the picture more stable?? I tried changing the Vertical Interpolation from "adaptive" to "frame" and the jitter went away but then I started noticing slight combing during scenes where alot of movement or action was going on and constant combing during playback of extras on the pal dvd's . Is this a problem with all Jaton dvd players or do I have a defective unit??