I thought that judder occurs with all NTSC- presumably all NTSC are 60Hz. The film in question is House of Flying Daggers SE from China R1/2/3/4/5/6. Plays wonderfully with high bitrate. One of the highest quality I have in my growing collection. Can anyone explain? What's more, it has DD and DTS at £5.70. The downside is that the menus are in chinese. However, there are english subtitles of course.