Poor quality Export for HD with moving objects

When I export from iMovie6 any moving image is very poor quality. I am using a Sony HDR-HC1 and trying to export at the highest possible settings.
When the image is still the quality is very good, but if anything moves the image goes "wobbly" and "jigsaw" like. Panning shots are hopeless and anyone walking in the shot goes wobbly.
The original capture image seems fine, so I assume it is an exporting problem. Exporting at lower setting, ie for an iPod, the image is great.
I have tried all different setting, some are better than others.
Can anyone help?

Your description of the problem - a 'comb' effect - sounds as if the "fields" which make up the resultant picture have been put together in reverse.
(..You don't normally see 'interlaced' video in iMovie's playback window - you normally see just a single field of the two, to make the picture clearer and simpler to display..)
[..A video picture's generally made up of two "fields" which each comprise half the number of lines down the screen: one field comprises the odd-numbered lines, and the other the even-numbered ones. Your exported video should be encoded with the lower (2nd) field first ..as described in this Apple document ..and the problem's mentioned here as well..]
However ..you said in your first post that "..I am using a Sony HDR-HC1 and trying to export at the highest possible settings.."
This is an HDV camcorder, and you didn't say if the original footage which you shot was HDV or normal DV. (HDV is recorded differently from normal DV, as it's recorded in a more compressed format, and it has to be automatically 'unscrambled' by Apple's Intermediate Codec while you're importing it into iMovie HD.)
It seems as if somewhere along the chain of importing>editing>exporting, the fields are being reversed, so that you get this jumpiness on replay when QuickTime tries to deliver a "highest quality" interleaved replay of both fields:
Ah ..sudden thought: you mentioned that you exported thro' iDVD: "..I have used iDVD by dropping it into a DVD theme and it seems to work ok, although the playback is a little jumpy, not quite as good I would have expected.."
You may have left the iDVD settings at their default 'NTSC' instead of switching them to PAL.
Check your iDVD Preferences ..that may be the problem.

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Image Size: 1024 x 768
Pixel Depth: 1024
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Average Data Rate: 797 KB / second
Pixel Aspect Ratio: 1.0
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Image Size: 1024 x 756
Pixel Depth: 1024
Frame Rate: 24.00
Source Audio Format: 48000 Hz - 16 bit - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
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Average Data Rate: 867 KB / second
Pixel Aspect Ratio: 1.333
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Message was edited by: derdav

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