So i dialed in my 46/4 for upscaled dvd playback via the oppo 981. Little did i know, that the wide/standard colorspace option would burn me as bad as it did. Using Avia, cal'd for the usual (contrast, brightness saturation, and hue) played with the advanced settings until I thought i had achieved a reasonable picture. Then started watching movies (I'm a format war holdout). Looked beautiful. REcently started noticing horrible green push in scenes with limited luminance, particularly chapter 18 in ghostrider. Rechecked black and white balance, saturation and hue, and came up with near identical results. Chapter 18 again, looks the same, if not worse (possibly my eyes playing tricks). Reseat the hdmi connection on both ends, ch. 18 still no improvement. Tried different hdmi cable, no change. Check ch 18. in another non upscaling player connected via component, seems to look as I would expect it too (no excessive green push). Disconnect ac source to Oppo, wait and then try again. Still no change. Recheck with Avia, all is well. Scratching my head as the grayscale patterns on avia don't exhibit this green push. I probably should have tried a different Hdmi input on the set at this point, but I know things didn't look like this initially 4+ weeks ago. Avia being no help at this point, I took the scene where the Ghostrider is on top of the bridge strut and paused it, and systematically went through the settings for what seemed to be the 10th time, but this time with content as opposed to test patterns. Got to colorspace (which I must have changed to wide at some point, but don't really recall). Switched back to standard and the green push disappeared.
So my point is, although you can calibrate using a test disc with the display's colorspace set wherever you want, the push I speak of won't show up in test patterns (as they are mostly static), only playback of encoded media content. I came within a breath of sanity, to learn this. Hope it helps someone else.