Unity editor 5.2.1p3 and Unreal editor 4.9 now work for me, but the first run of Unity after upgrading froze the editor when I hit play without turning on the blue light. Including log in case it helps.
I installed the latest nvidia drivers(358.70) and this 0.8 RC2. all works (config utility and tiny room), but after going from 0.7 to 0.8 in my engine I only get a black screen on both the rift and mirror texture, blue lights are on on both camera and rift. Is there anything obvious that would cause this? I'm also on a gtx970 now no longer on the gtx650. I do get a single flicker of noise on the hmd but after that black. will keep looking to see if I missed anything.edit4: just an error on my part, black screen gone now and display properly - (I had copy and paste without using the param for the changes in tracking state).
edit1: now tracking camera light is not turning on and config utility says "rift DK2 attached, no tracker attached". will try reinstall, it was working just stopped.
edit2: changed the tracking camera USB port after reinstall and started working again.
edit3: found that if I open config utility tracking camera blue light turn on straight away. if I close it then run tiny room sample and then close that, then open the config utility the tracking camera blue light doesn't light up until I start the config demo. in my previous edits this is where the tracking stopped working. just mentioning it.