I have the same problem with two Samsung LCD TVs I recently purchased. I called samsung several times and they are aware of this problem but apparently are in no rush to fix this. I feel like returning the tvs is the only solution.
I just bought and setup UN46C6400 ; All the features and internet widgets work as expected except NETFLIX ; when I click on the netflix app an icon comes up as connecting and stays there.
I have upgraded the firmware to the latest version.
I can use picassa web application so my internet connection is not a problem.
Netflix streaming ability is one of the reasons I bought the TV ; can you provide any suggestions to fix the issue.