Hi, Thanks for the response.
I am working in PAL format, the best I can describe the problem is thus:
whatever sequence I create in motion presents with the same problem. On playback in either FCP or Quicktime viewer the video pauses regularly every 1 second and one frame. it is as though one frame repeats at this point. I can delete one frame every 1.01 seconds, but this is not a great way to work.
I hope you can assist.
Regards, Ezio