My 65KS7580 just updated a few weeks ago to 1240, and the difference is that no network device is shown in the source menu, only the sources that are phisically connected via HDMI, which is really upsetting. Every other device in my home (PCs,Android Tablet, and a PS4) can find and stream from the media server with no problem. It does work however to cast content on to the tv itself, with a third party app, called Bubble UPNP on android, and the built-in media player of the tv plays the content as it should. It's like if the tv on itself does not find the source at all, but with a 3rd party app you can "show" the right path to it. I'm wondering if Samsung is aware of the problem, and are working on a fix, because right now for me, playing content from my local network only works with this work around, and I tell you it's not the best way.. I'm curious if other people are experiencing this issue, with 2016 QHD tvs as well, when trying to play content from a local network media server.