using decrypter and dvd2one works fine then nero 6 to burn. Test with a -RW this plays OK. Next burn copy on a LASER DVD-R disc. When I play the disc the DVD player vibrates badly for the intro to the movie. After this has past the disc runs smooth as ever. This has happened with 3 movies backups so far. I find it very weird!! Anybody have a clue what is going on???