I just installed my Panasonic 60" ST60 and noticed the same greenish hue after my self-performed calibration (set is new and has not broken in). My reference set prior to this one was the Pioneer PRO-101FD calibrated by D-Nice (which is happily sitting in the family room). I hope that with time and another calibration this issue is mitigated - I appreciate the larger size of this set but there is something about the Kuro that is unmatched yet intangible (just looks more natural/organic). I hope I can wait it out until 70"+ OLEDs can be had for under $5K
I'm hoping I can live with this one until OLED too. Hopefully yours isn't too bad and still watchable. The more time I spend watching content on this set the more I think I can pick out the patterns of where the problem is occurring. I think I've nailed it down to the "area-based ABL" as I'm calling it. It's quite apparent to me on any human skin tones or faces. It's known that ABL effect warms up the color temperature a little bit, but what I've noticed is that any particular spot on the screen gets an ABL effect relative to the sum of bright areas around it. That might not make sense, but an example would be a person's face in certain lighting conditions. I think this is really noticeable on people with very dark hair. The center of their face will be the warmest/reddest, but the top of their head near their hairline (which dark hair won't be emitting very much light) often takes on a greener tint. I don't think it's necessarily overly green, but I think the rest of their face becomes too warm and when viewed together the green is more likely to stand out as unnatural. Similarly, if someone was in a dark room but their face was lit, the "glow" would occur on the outside of their face all around.
An opposite example which I witnessed today: a scene with a dark skinned man turned to the side, showing his profile, everything looked completely natural except his ear (near the center of his head) which had a very green tint. The surrounding area around his head was bright and adding more redness & warmth to the edges of his face while the center was further from this effect so it remained greenish in comparison.
This can even be seen on a full-field white screen. There's a faint red glow coming from the center of the screen and the edges remain whiter. This also emphasizes that things aren't actually too green but in skin tones we might tend to pick the redder shades as looking more pleasant or natural.
Does this sound accurate to how ABL is supposed to work? Because that's what I'm witnessing. And I'm betting every problem I have with this set is caused by this effect.
To chunon's point from earlier, I have settled on some settings which are a little overly saturated as it helps take away from the problem slightly... in the end I'm actually using very basic settings without any detail calibration at all, because it's gotten to the point where the more I think about it the less I can enjoy this $1000 I spent 7 months ago. Oy.
Edited by vkamicht - 12/15/13 at 12:13pm