Scaled down, rendered clips have weird motion blur

I have a project I'm doing in FCP 4.5 on a G5. I have several clips that I have scaled down to 55% and have positioned at even X,Y coordinates. The project is rendered, but I get a weird motion blur happening - like when you're watching a low grade QT movie. I have copied and pasted the sequence into a new project/sequence timeline and re-rendered. I have motion blur selected in my main user preferences (render options) and in the sequence settings (render options).
Any ideas why I'd be having this problem? I don't want to have to go to the length of recapturing the source footage, but I'm almost at that point.
Any thoughts?
Jaimey
Powermac G5 Dual 2Ghz Mac OS X (10.3.9)

Are you monitoring this on an external NTSC monitor or TV? You cannot judge the quality of your images as viewed on the computer screen.
#2 Playback is blurry
Shane's Stock Answer #2:
1. Disable overlays on the canvas
2. Make sure you've rendered everything (no green bars at the top of the timeline
http://docs.info.apple.com/article.html?artnum=24787
DV footage requires large amounts of data and many computations. In order to maintain frame rate and be viewable at a normal size, only about one-fourth of the DV data is used in displaying the movie to the screen. However, the DV footage is still at full quality, and is best viewed thru a TV or NTSC monitor routed thru your camera or deck.
Shane

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