Vertical black line artifact on JPEG exports

Tried to export 57 images to original sized JPEGS. Images were shot RAW on a Nikon D80. My problem is that some of the photos were exported with a thin black line down the middle of the image. Strangely, this only happened to my photos that were shot in portrait orientation. This line is not there in the RAW files, or in the Aperture previews. I also exported one of these images to Photoshop CS3 for editing and the vertical black line appeared in that conversion as well. Does anyone have any idea what's going on or how to fix it?
Example here: http://dl.dropbox.com/u/1375121/black_line.jpg
I am running Aperture 3.0 and OSX 10.6.2 on a MBP 2.16 C2D with 2GB RAM. Aperture runs slowly, but otherwise seems to be working fine (except for the occasional green screen freakout when I'm using a brush).
Thanks so much,
Austin

AustinFlack wrote:
Yes, the images in question definitely have Noise Reduction. I think I set the value over 1.6. So there's no solution? That's incredibly frustrating.
We only have to wait for a new release!!
I have also noticed that the Noise Reduction seems not to be applied to the exported version, at least not in the same way as it is applied to the master image. Have you noticed this?

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