Aspect Ratio in Front Row

Hi all,
I have started capturing video of Sky TV with a ADVC300. I record DV 48k Anamorphic into Final Cut and compress out with compressor. Now when the video is viewed in quicktime the aspect ratio is correct and the video looks fine. However when viewed through front row the video is not widescreen (16:9) but ends up being (4:3) and smaller in the centre of the screen.
Movie spec is H.264 720x576 (1024x576) when view in qt inspector.
Any ideas were I'm off wrong
Thank
Steve

Jon, thanks for the quick answer.
Thus, without the flag being set, I assume your clip is actually being display in Front Row at 720x576 rather than the proper 1024x576 aspect ratio here. (Can you confirm this?)
That's right, it's displayed at 720x576 and thus appears 'squashed' from the sides.
I assume the Front Row and iMovie technicians did design the applications to work in this manner for some good reason but don't pretend to understand why.
Being new to Apple, I get amazed on a regular basis about how much people argue over the color of some insignificant icon and totally ignore some of the major inconveniences (inconsistencies?) in the OS... (still a big fan though, I didn't switch for no reason )
AFAIK, the only way you can correct this problem is to set the flag or change the size of the encode matrix. Unfortunately, the only way to do this is to re-export/re-compress the file which does not seem to be within your stated mandate.
I'm not sure what you suggest I do... Can you be more specific? It will help me decide if I really should go through all that export/compress thing. Maybe there is a utility that will allow me to set this flag in batch?
Again, thanks for your time.

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