why bother. Almost every bug seems to only affect one or two people. It's almost never a universal problem. Anyway, here's my one contribution before I just go back to 2015.3.
When I drag a 4K clip onto a 1080p timeline, there are no scrolling bars to position the clip in the program window, even when I go from "fit" to "100%". I'm not going to go nuts with bugs just for the minor updates. Cheers!