Bob, you might want to check your levels with the gray scale patterns (the horizontal bars one with the grayscale gradient) found in DVE just to be sure there are no skipped gradients. For example, it should be 16-16-16,17-17-17, 18-18-18, etc. with no gaps. However, the resolution you choose may cause some to be skipped - ie. 100-100-100,111-111-112,112-112-112,etc. which is likely a result of the scaling algorithm used - guess you shouldn't worry about those. Okay, I admit, that's being anal.
It's odd yours starts at 15-15-15. Is that with FFDShow? NVIDIA Drivers? Also, what resolution? At 1280x720 on my 6800GT with the 67.66, 71.89, and 72.14 drivers, I get perfect tracking with grayscale in DVE and 3no's patterns. However, with a version of TheaterTek before 2.1.1, the grayscale isn't perfect smooth - a scaling artifact was introduced that didn't make grayscale perfect in the grayscale patterns. Man, are there a lot of variables or what? All I know is that with TheaterTek 2.1 on my 6800GT, I get perfect levels tracking as long as all brightness/contrast/saturation settings are left alone at zero.
I assume you're using VMR9, since Overlay doesn't really let you take a screenshot.
lovingdvd, it shouldn't be any problem burning 3no's pattern to a DVD. Nero Burning Rom should do it easily in DVD-Video mode. The only issue I can see is that you have no way of knowing if you are getting exactly 16-16-16 for reference black and 235-235-235 for reference white on an upscaling DVD player like your D1. But you can get close, I hope.