Bad Jitter in FCP 6 Export from 4.5 Source Project

Question

Hi Folks,
I took a project created in FCP 4.5 on my old Power PC running X.3.9 and opened it in FCP 6.0 on our new Dual-Core Intel machine running X.4.11. (This, of course, required "updating" the project into 6.0 - I did a Save As to retain the integrity of the original project.)
All looked fine & I did what I always do - exported the final sequence using QT conversion as an uncompressed .mov file (never mind why - this is what works for us). Same settings used as always (as much as possible in 6.0). The resulting MOV shows an absolutely horrible jagged jitter (much worse than just an interlacing problem) around any area of movement at all.
This MOV gets taken into BitVice for MPEG-2 compression & encoding. The resulting MPEG-2 shows the jitter even more dramatically than in the MOV, but it's definitely showing up first in the MOV.
Sure seems like whatever it is occurred in moving the project from 4.5 to 6.0. Could that be? We have literally hundreds more projects that are going to have to go through this same workflow, so this has to get resolved. What could I be doing wrong? A setting somewhere? A bug? Any thoughts are greatly appreciated. Cheers!
Old machine:
Dual 1.8 GHz Power Mac G5
1.25 GB DDR SDRAM, 250 GB Hard Drive

Answer 1

Jim, Hanumang - Thanks very much for your replies. I tried both suggestions (Export as Self-Contained QT movie and Applying the Shift Fields Filter) and unfortunately neither produced a result any different than what I was getting. I did do side-by-side comparisons.
Let me try to explain more about what I'm doing and perhaps a light bulb will go off. Thanks again for any help with this.
We take ten year old high-8 tapes and capture them using an old Aurora Igniter X card (using the Aurora Online MJPEG-A codec), into a Power Mac G5 running Panther and FCP 4.5. Our capture settings are: 720 X 480 NTSC DV (3:2). Sequence Settings: same frame size & aspect ratio, Pixel Aspect Ration is NTSC - CCIR 601 / DV, Upper (Odd) Field Dominance. Everything, everywhere is set at upper field dominance.
I export this footage our of FCP for a variety of different purposes. I do it using QT conversion because that allows control over resizing, quality, color, codec, etc. It would be hard to imagine that this is where the problem is being introduced since it has worked for me flawlessly for years in FCP 4.5. Not ruling it out, just saying.
When I export using QT conversion, I select "None" as the compressor - when I'm in my DVD workflow. I dig what you're saying about that being a misleading name for a lossy codec, but I've been very happy with the results. I always set Upper Field First in these export settings as well.
Just to be clear, this is a workflow that has never produced this particular problem (horrible jaggy edges around everything that moves) coming out of FCP 4.5. This only started coming out of a project begun in 4.5 and converted into FCP 6.0. It's hard not to focus on the only factor that changed (converting the old project to the new FCP version). I really hoped Hanumang was on the right track with the Shift Fields, but alas.
Any thoughts - even on which direction to think in - would be greatly appreciated. As mentioned, we are going to be bringing many projects captured in 4.5 into 6.0. If we can't resolve this, it's going to be grim. Thanks, all! Cheers.
P.S. We love BitVice. They have also given us incredibly personal support. Compressor, I'm sure, is a great program, but I have always found it next to worthless for my needs.