[FCP-L] Bad jitter in rendered clips from AE

I have a 30 sec clip that was rendered to an Animation codec at 29.97fps for broadcast in SD NTSC. The video was all shot at 1080i at 29.97 on a green screen, and the graphic designer composited that behind & in front of other layers that she created in After Effects. When I bring it into Final Cut (6) and render it in 10 bit Uncompressed (though it doesn't seem to matter to what codec I render it) the whole timeline plays back very jittery. It almost looks like it should be de-interlaced - except that the jitter looks like it's vertical, not horizontal. It looks like this in FCP, Quicktime, & After Effects. If I stop on each frame it looks great, but stepping through slowly looks jittery, also. It's as if I had slowed it down & repeated the frames. In fact, she tried rendering it out at 60fps & it looks great - exactly what I wanted, however I can't put that on tv.. But if I try to convert it to 29.97 it looks just as bad. I've tried every combination of field dominance, codec, progressive or de-interlaced, and most other option I could find or think of.

Anyone have any ideas? Can I provide any more information?

Thank you in advance,
Mike

Mike McPhail
mike.mcphail@foxtv.com
WJBK-TV Fox 2 Detroit
248.395.8695

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