I recently purchased the movie "Doubt" (the U.S. version) and had problems copying it. I used the "Main Movie" option in DVDFab, but the copied version doesn't play correctly (has a lot of hesitations and didn't show the credits). Also had similar problems with "Slumdog Millionaire" and "The Wrestler" although not as noticeable as with "Doubt". Each DVD was purchased from reputable, large chain vendors. How do I overcome the "hesitation" in the copies. My burning speed is set to 4X for 16X DVDs and I'm using TYs.