Hi Edd,
Is your Player set to out PAL, if so can it be set to PAL60 or NTSC, alternatively some players offer AUTO ewhich senses what standard is being read and outputs video in that standard.
Obviously your TV has to be able to cope with PAL60 or NTSC as well as standard PAL.
Outputting region 1 films ie in NTSC in PAL mode or to a PAL only TV gives this type os stepped/jerky look and feel to the film.
Hope this helps
Cheers
Chris