Not a regular visitor until recently when studying up on this TV. I've posted to the tracking thread but wanted to provide more details here.
I have a 47 SN that I received on January 31 from Amazon. I've loved it so far but have noticed a couple things.
1. Twice the TV has frozen for about three seconds while watching Netflix. The screen goes blank but remains powered on (this specific issue is via alerts from my wife that I've confirmed the details of in person). Then she powers the TV back on even though the white status light on the bottom-left of the TV never goes out. It turns back on and defaults to HDMI 1 even though she was just in Netflix (probably normal since TWC box is on). She starts watching again with no problem. I eagerly await to witness this for myself.
2. On dark/black screens, there are some minor bright spots that aren't very distracting but can be noticed if you're looking for them (and I've been trying to notice everything possible). White screens seem to show some clouding or circular distortion (halo effect). It's very slight and hardly noticeable, but noticeable nonetheless. 98% of the time, it's fine and I absolutely love this TV's picture. Coming from a 47" Vizio LCD that I loved, this is even better and can live with what I've noticed so far.
Just a couple observations that I wanted to contribute after reading through the thread. Is what I'm seeing a pretty standard thing for LEDs? Luckily, our room is bright during the day and well lit at night and I've yet to watch TV without any lights but will try soon. I'll post pictures if it becomes more noticeable.
Lastly, it came with 1.1.4 but after a day, it updated to 1.1.5. Didn't notice any issues before or after the update.