I have only noticed some very very minor flashlighting in the 4 corners. I have not seen ghosting, haloing, or banding yet, will need to run some dvd content, but thus far this set seems way better then the lx9500. I do believe the lx9500 I had was defective, but others have mentioned they have the same issues, and, according to LG the issues I had were considered normal design of the panel.
Thus far this samsung is ok, but I have my receipt handy in case it I decide I just don't like it, etc.
One note on this samsung, when I went to update the firmware it said it already had the latest, so either its a very new panel or samsung simply stopped issuing updated firmwares.