Canon RAW images displaying color borders at contrast edges

I noticed annoying color borders in RAW images taken from my Canon PowerShot S120. They look like the color planes are misaligned. Around high contrast areas (between light and dark grey) I can notice magenta borders in one direction and cyan borders in the opposite direction, both approximately 5 pixels wide.
I record and store images as RAW+JPEG pairs. In Aperture I set RAW as master.
In the original JPEG of the image pair from the camera this error is absent, the color is neutral on both contrast edges.
The error in the RAW image can also be seen when the file is opened directly in Preview or if the RAW image is exported to a TIFF using Aperture and then opened with Preview.
I compared this to older RAW+JPEG image pairs I took with the previous model, a Canon PowerShot S90. There I see yellow and blue borders in opposite directions in Aperture or Preview, also approximately 5 pixels wide. In the camera's original JPEG image from the image pair this is still a bit visible, but far less pronounced.
My oldest RAW images taken with a Nikon E8800 (.NEF) don't show such artifacts when viewed in Aperture.
Since the JPEG from the pair does not have these artefacts my guess is that the RAW converter is not optimal or some metadata in the Canon RAW files (.CR2) is either missing (worst case) or not used correctly.
My hope is that I just have to adjust some presets to correct this. Else it is probably up to Canon or Apple.
Does anyone know how to fix this issue (without going through the individual files, if possible)?

Hi Keith
Thanks for the infos.
Just to clarify:
I didn't ask for RAW, I just use raw formats because there's curretly no better alternative. I would like to see what came into the lens - like an ideal hole camera . Ordinary JPEG is way too limited (8bit resolution per color channel plus really ugly compression artefacts).
For archiving I would much prefer the JPEG2000 format with lossless encoding and as many bits per pixel as the camera's analog to digital converters provide, linearly encoded (above the noise background but including one bit of noise, to be precise). But, alas, when I did my last experiments (Snow Leopard) the image framework in Mac OS X did still not support more than 8bit resolution per color channel in JPEG2000.
One good thing about raw formats is that the corrections could actually be better than what is always done by the camera's firmware for JPEG or standard TIFF at the time of the shot. Another good thing is that various sensor and color patterns can be handled directly.
If Canon can do it in DPP, then I strongly hope they will also provide a better converter for Mac OS X. On some pictures this aberrations are really obvious and irritating.

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tried already in the german forums without answer, so will try it her
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Message was edited by: MTSTUNER

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Hello!
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Hi.
I'm having a problem with some Canon RAW image files a second photographer sent me. He sent about 800 files and I'm only able to import into LR (1.3) about 15% of the files. The remainder will not import. Upon import, LR says something to this effect: "files appear to be unsupported or damaged." I tried them on both of my macs (my G5 and laptop) and had the same thing happened. Photoshop says: "Could not complete your request because Photoshop does not recognize this type of file."
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This is a picture of the "get info" window:
file:///Users/marthafitzsimon/Desktop/Picture%201.png
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Thank you for any help you can provide! Martha
Message was edited by: marthafitzsimon

LR 3 is a complete new build so it will not overwrite the earlier version of LR 1.3 or its catalog or other settings.
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Download the trial which is good for 30 days before you will need to pay the upgrade price of $99 if you decide to keep. The trial is the full package and you will not be restricted in any way.
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Canon RAW images displaying color borders at contrast edges

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