On my monitor the colors look different (much less saturated on the UK screenshot). On dvdmike007's monitor the colors look the same.
Ok...here's the weird thing; when I save the original PNG file (from the screenshot of the US review: http://www.highdefdiscnews.com/?p=90755) the colors change during the save process. After the save process the colors look identical to the colors of dvdmike007's screenshot (UK).
After watching the blu ray, I have to say that this is my favorite Wes Anderson film. It's the best realization of his aesthetic, and it connects with me emotionally. The few extras are nice, but I really hope we get a special or Criterion edition down the line. I'd love to see a full production of the Noye's Fludde play.