>Does Quicktime Conversion automatically de-interlace .mov files created from the time
>line?
No it doesn't, at least the last time I tried it in FCP 5.1 (that's also how long since I've used QT conversion). There's a checkbox to deinterlace videos in QT conversion. Make sure that is not checked. Also, make sure you are not resizing your videos.
I'm not sure how you are checking fields.
Make sure high quality video is checked.
On moving objects, you should be able to see a combing effect. This will be extremely evident on fast moving objects on a still frame.
www.strypesinpost.com