I've noticed both with my Canon 20D and my Nikon D100, that if I shoot brightly contrasting colors right next to each other there will often be a solid, line of different-colored pixels at the boundary. (I have a posting in the Digital Cameras forum about an instance of this). For example where a dark blue object and a bright orange object come together there will be a solid bright red line a pixel or two wide outlining the blue. It almost looks like a sharpening artifact except that I shoot strictly Raw so there should be no in-camera sharpening. The red fringe is definitely not chromatic aberration because it's the same on both sides of any object and occurs all over the frame, whereas true c.a. would produce a red fringe on one side and a blue fringe on the other, and be worse near the edges. People have suggested that I try different raw converters but, (A.) I have no reason to suspect a different raw converter would fix it, and (B.) if it IS a Raw converter problem then I assume another converter would introduce its own artifacts. I already know this is the case because the EOS Viewer Raw converter produces weird streaks with high-ISO Raw files that do not occur when the same files are converted with DPP. Is there any Raw converter that's free of artifacts, and doesn't just represent a different set of tradeoffs? I don't want a workflow that forces me to convert the same files through multiple converters to see which one I like best. Also, I work professionally designing digital image processing software, and while my work does not involve bayer matrix conversion, the idea of trying to faithfully reconstruct an image from R,G, and B samples taken at spatially different locations has always seemed fraught with risk, to me. I could easily imagine that artifacts could emerge wherever you have two very different color regions at adjacent groups of sensors.