I've gotten the 3.33 update, and I was just watching an OTA HD broadcast ("My Name is Earl", NBC). There was a scene where the entire frame was full of VERY saturated reds. My picture turned disgusting. The scene was "posterized", meaning all of the subtle shades of red were turned into large blobs of flat red. And each blob was bordered by an obvious black outline. (It looked like a red camouflage pattern.) It's a symptom I've never seen before. There are plenty of potential things that could have gone wrong in the display chain (Bad picture on the network end, bad picture on the affiliate end, something bad with the CRT or it's settings...) But, like I said, I've never seen it before, and it's awfully coincidental that it's something that showed up after only a couple hours of viewing on the day the new software was loaded.
Oh, I guess I should mention, I'm using the DVI output on the 811, and I'm running to a well calibrated direct-view CRT.