Originally posted by: Max_Rebo
the duration in virtual dub is correct and it plays back at normal speed, but some frames do appear interlaced (which shouldn't ever happen with PAL) ...

You shouldn't get interlaced frames with PAL for those movies shot on film. However, this was a made-for-TV movie, so it's possible that you're dealing with a poor NTSC-PAL conversion. This might be what's throwing Womble off, don't know, only ever used it once.

I can think of two possible solutions, neither is ideal:

1. Process the video with AVISynth or VirtualDub to try and make it progressive. This means re-encoding the whole stream.
2. Buy the Region 1 NTSC version and see if you get the same effects.