Just when I thought I understood how images work on the web; the differences between GIF, JPG and PNG; and when to use each type of image; along comes a new technology: color correction. The ICC (International Color Consortium) has a standard that allows for information about how an image should render by an application. Most commonly this is used by image editors like Adobe Photoshop. But now web browsers are getting into the act. See Is Your System ICC Version 4 Ready? for an example. In Safari (under OS X) the image looks fine. Under older browsers you see the different color profiles used in the image.