yes please help on this, i have the same problem.
I have some movies saved on an external hard drive that is plugged into my Samsung 55" LED 3D TV. When I play the movies, they have that "soap opera" look. I am assuming this is an issue with having the Auto Motion Plus turned on, but I cannot figure out how to turn this off for the USB input. I can turn it off in every other input, but not USB. This is also a problem with any movies in the Internet@TV section (such as Netflix). Any help would be very much appreciated.