I can see some of that happening with television transmissions depending on the signal quality. However, what I might suggest is making sure your Blu-Ray player is sending 1080p.
That said, some blu-ray movies will only be as good as the film content itself. If this is happening with all of your movies, it probably points back to the panel.
I'm not sure why there would be a curtain of picture on the front of the television. Your best bet is to contact service again. I wish I could diagnose this, but I can't do that kind of diagnosis remotely.
I have had my 3 month old ln46550A serviced twice for this --first a mainboard, then a video board--Still the same as I mentioned in the subject title--------The only way to find out if it is the tv or quality of the film ( video ) is to have another tv just like it so I can compare the darn pictures--It occurs in all video sources including blu-ray and I am very disappointed, because if this is an LCD " thing", it sucks.--Thanks--Ed
PS--It almost appears to be like a veil or curtain IN FRONT of the image, as if there was a layer of dust on the screen itself