Green chroma noise patterns - Sigma SD15

In this blog post I want to address Sigma's high ISO chroma noise problems (aka Green noise patterns). I know that you probably have thought that I've gone crazy after wiring the reason I opted not to buy Sigma SD15 camera. You know, at first, I was really impressed and still do, with the image quality at ISO 100 to 200, but after watching some high ISO pictures on pbase photo sharing website, I