First time poster & had my 50" F6400 a little over two months.
The recent FW update has corrected a banding/jittering error I had with smooth motion. It was especially noticeable while watching my Star Trek into Darkness BD. When I brought my LED home and set it up I didn't have this issue as this was the first BD I used to test the PQ and make sure my Yamaha AV was properly connected to the flat screen. Suddenly a month later the banding and ghost imaging appeared during a specific scene in the film. The only way I could correct the problem was set smooth motion to Clear in picture settings.
After the recent firmware update I adjusted the smooth motion to standard and so far I haven't experienced the weird banding or distortion while watching Netflix and Amazon prime. Out of curiosity I gave Star Trek into Darkness a spin on the Sony BD player and sure enough it was gone while watching with Smooth Motion set to standard. And that ghost imaging that appeared while the shuttle departed from Starfleet headquarters was gone, fingers crossed the entire first 30 minutes of the movie
I suspected it might have been a result of an earlier firmware upgrade which is why I keep the auto update off. Recent updates have indeed improved my wifi connection with hardly any dropouts while watching video apps like Netflix, Amazon and Crunchyroll.
This a great thread and found it to be very insightful when I was troubleshooting the banding issue. Thanks everyone for all your invaluable input.
Has anyone else noticed any improvements? Please share and thanks again!