However URLs such as support/model (as above) are absolutely useless since they will always link to latest fw, therefore not specific one mentioned at a given time.
At least direct (downloadcenter.samsung.com) links could be useful one day for history, who knows...
Yes, I noticed that they have managed to brake ARC with external soundbar.
I have a setup of UE43J5600 Smart TV with the HW-K450 Soundbar and been using it over HDMI ARC + DTS Neo 2:5 until now to have a crisp sound from the soundbar.
Immediately after the message of the update was shown on the screen I have began to experience random skipping of the sound, sometimes nothing for 10 mins, sometimes every 5 seconds.
Contacted Samsung support team (BS team) and they connected via Remote Support, did a reset to factory, etc. and concluded that this is a BUG in the firmware and that it will be escalated. This was aprox 2 weeks ago. Nothing since then, except that I should wait for the next update and hope that it will be fixed.
Last time when I will buy anything from Samsung.