Think I may have figured out that flickering problem. I was watching Akira last night and at the very beginning where the "camera" pulls out of the crater, the black level was floating, rather, flickering between dark and super dark; however (I'm not in front of my tv right now so I don't think I have all the terms right), I went into the picture adjustments and changed "HDMI Level"(?) from "low" to "normal" (I had seen the setting before but it was greyed out until then.) No more flickering... at least on that scene.
In regards to the Dynamic Contrast setting, has anyone checked yet to see if that's merely adjusting the brightness or extending the ANSI (or on-screen) contrast? I was thinking the black level was lacking in high contrast scenes (Quarttrich's (sp?) intro scene in Avatar for example, the blacks looked really grey) so I changed it from "off" to "low" and it seemed to be an improvement. Didn't toy with it much last night other than that, and lowering the contrast level a bit.
As I stated in my review over on the "Samsung 2011 plasma" thread, mine has a really bad buzz. It's a long-shot but I think my wall mounting screws might be a bit long so I'm going to put a couple of washers on to see if that does anything, if not, I'm taking this unit back and swapping out for another one. I really like this TV but the buzz is just about unbearable; since no one else seems to have a serious buzz going on, think it might just be my unit.