I'm a new mac user, and had used the macbook pro 2.4G with LED backlight for one more month. I find the color gradient is not smooth in secondary primary color to primary color. Please check the upload PNG files. In those patterns you will find many vertical lines. Those will make you see some images with contour or noise by Macbook Pro. I have double check many other PC notebooks. They don't have this issue. It is hard to believe the high-end notebook has such kind of color performance. The color performance is too poor to use the "Pro" title. I feel so disappointed to spend a huge amount of money on the Macbook pro( Poor?).