I bought a 50VT30 a week ago but had to send it back for a refund because of the dreaded green and pink tint issue. Thinking that it was limited to my set, I tested 4 other panels of different manufacturing dates but all exhibited the same problem. It's a beautiful TV and I'm aware that there's no such thing as a perfect set but the color uniformity issue is just significant and something that I can't live with. Actually, it was my wife and daughter who spotted the anomaly when we were watching Pirates of the Caribbean 3, the bright "crab" scene, where patches of green and pink tints are obvious. The thing is, it's difficult to spot the issue when you use the color test slides. It's only after you've seen how the issue looks like that it becomes easy to discern on the slides.
After that incident, I was informed by a good friend who's deep in the retail business that there were only a limited number of VT30 units (around 120) that were brought to the Philippines for liquidation purposes. These units all came from Sinagpore and are those that didn't pass in-store customer testing or were sent back because of the green and pink tint issue. He added that a software update cannot guarantee to fix the problem because it's a manufacturing fault. I think their marketing strategy worked by dumping the units in our country because all the panels I tested and even the one I purchased was sold a few days later.
If you have the VT30 and happy with it then I suggest that you don't go look for the green and pink tint issue because it's hard to unsee. Just enjoy your set.