This is supposed to be a uniform solid grey screen, yet the left and right sides are different color temperatures. The dynamic backlighting (aka local dimming) has a very minimal effect on the right in comparison to the left. These problems effect colors on all inputs and different types of viewing content. Also, the right side of the screen is more saturated in color than the left.
Authorized Sony technicians came out to inspect the television on two different occasions, from two different repair centers. Both said they consider it to be defective and wouldn't be satisfied either, but Sony refuses to acknowledge the problems exist. Rather than agreeing to repair it, Sony's only offer is a refund. Way to stand by your products, Sony!
Here's a response from Sony's VP of Engineering...
"There does not appear to me to be a problem with the color uniformity, but he may not like the algorithm determining what color is displayed. The Family Guy scene may be the TV or may be his Laptop.....I'm not sure which is correct. Nothing we can do about it. I see from the test pattern a slight right edge mura, but that would appear as a shadow and not a color uniformity issue and that is not his complaint. That is also in spec. If the customer is not satisfied with the set I agree at this point we should buy it back and not extend another offer. The HX929 is one the highest rated LCD TV ever by CNET and ENGADGET so it is not like there is anything better we can offer. - Tim"