I opened your image and see that you have no color space assigned to it, When I looked at the Saturation levels, the image is over saturated, and your shadows also are suffering clipping.
I find it odd that your version of CS4 for Windows has not been set to apply an image color profile tag to the image. It seems to me that what you are seeing is largely within your own Windows system and the way your computer is displaying the image.
Your screen capture of the yellows does not look at ALL like what I see. What color space are you working in? What color space do you want to assign to images to be shown on the web?