Not familiar with the led 3d performance, except for a recent visit to a friend who just got the led UN55D7000. I thought the 3d performance pretty poor but we didn't check settings, just watched a bit with the settings as is, no ghosting just a pale 3d compared to my own set; I have a PN59D8000 and the 3d performance is quite good. Your problem seems to point to defective unit IMHO.
"I realize that somebody playing free music isn't as commercial as a hamburger stand. But is it because you can eat a hamburger and hold it in your hand and you can't do that with music? Is it too free to control?" - Don Van Vliet (aka Captain Beefheart) discussing commercial success in the music biz