I'm cutting in 29.97 DV footage into a 23.98 DVCPRO HD sequence. I have about 20 shots total of 29.97 material. Some of them (but not all!!) play back stuttery. When stepping through the frames, I find that FCP is actually REPEATING, instead of dropping, every 3rd frame of thos 29.97 clips. Obviously it's dropping other frames to make up the difference, but not in any obvious pattern that I can discern. With the 29.97 shots that are playing correctly, it's dropping every 5th frame (I think) and not repeating any frames, so playback looks smooth.
There doesn't seem to be any difference in the specs between the 29.97 clips that are working and the ones that aren't working. I've tried re-insterting the "bad" shots over an over again from the master clip, and from new master clips I created from the media. I've tried copying and pasting all attributes from the good shots to the bad shots. Nothing seems to work. Suggestions?