I have been posting in another thread so thought I'd update here as a search for casting might show this in results...
The most current Netflix App (January 24th on the Play Store) does not work with the ScreenBeam anymore. I called Netflix and they are acknowledging they are hearing of issues for some Android users since introducing the download to SD card feature. To be clear, they introduced downloading prior to the downloading to SD card...the December 9th version 4.12.2 is capable of downloading however it will only download to the internal phone storage (of which I have none left).
Specifically, however, for the ScreenBeam, they are saying their system shows it is "not supported". I explained that it had been working just fine all the way up to the December 9th 4.12.2 and she was very nice and said she'd report it and that "you are right it doesn't make sense it would be supported prior and now it's not". I don't know if this will get anywhere or not and I REALLY hope it's just a bug and not by design, because if Netflix is purposely shutting down the ability to cast then other apps will likely follow suit. Comcast had it shut down from the beginning (jerks)...but Amazon still casts...I haven't tested HBO.
Anyway I encourage you to call Netflix as well if you are experiencing casting problems with Netflix. Good luck.