Weird Slow motion effect with Motion4 and FCP7.

Hi everyone,
I was testing a simple slow motion clip when I encountered a weird issue with it.
Basically the clip of a person running in a room where there is a bookshelf and the weird effect is that it looks like there is an "halo" around the person and within such "overlap" everything on that path looks "melted/vibrant" distorted.
To better clarify the issue I uploaded a sample clip here:
http://www.vimeo.com/5891093
After doing some tests I've found a workaround to this. So the sample clip shows the problem and the portion without any problem.
The clip was shot in XDCAM EX 720p 25fps.
After ingesting and importing the MOV file into Motion I had exported the slowed clip out of Motion using the same codec XDCAM EX 720p VBR.
When I imported that MOV into FCP I got that weird effect on both canvas and final export to H.264.
As second test, instead of using the export from Motion, I decided to use the Motion project in the FCP timeline. Once rendered (as the motn clip was in the Motion Codec Decompression) as XDCAM the same issue appeared on both the canvas and final export to H.264.
At this point the strange thing was that if I opened the Motion project in the viewer it was working perfectly fine.
I then decided to export within FCP the Motion project to XDCAM 720p before instantiating it in the timeline.
So did that and I got a 720p clip that I imported in the timeline without any rendering needs.
With that clip the canvas was playing ok and so was the final export to H.264.
As the initial work in Motion 4 was ok and I didn't see any issue, I thought this might be some sort of FCP 7 issue (or some bad settings that I have on my system).
Anyway I've found my work around and just decided to share here just in case someone else could understand the behind the scene of this.
During these tests I have tried to place the Motion project on different timelines (in ProRes 422, ProRes 444) just to see whether the issue was due to a combination of factors including the XDCAM codec, but didn't fix the problem.
Cheers,
Armando.

Just for the record, I made another test with a different material and now I start thinking it could be a Motion4 weird behavior than an FCP7 issue.
I have shot another clip this time with an in camera slow motion (shot @60fps in XDCAM EX 720p 25pfs format), then applied to Motion4 for another 50% optical flow time remapping.
This time after checking well at Motion results, I can see the issue in the bookshelf area with vibrant/melting spots.
After importing the Motion project into FCP and then exported as self contained MOV in XDCAM EX 720p, the issue is gone as in the other tests.
I went back to the previous tests I made and checked better in Motion; the problem was slightly noticeable even there in one test.
So I guess it is Motion producing that weird output and not FCP, which seems btw fixing the issue.
Regards,
Armando.

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