Thank you!

This one happens to me on newer builds like blender-2.78-9cd6b03-win64. Tried with both a machine with Nvidia gtx 970 and other with Intel HD 530.

@Brecht Van Lommel (brecht) I meant to say a method to avoid it going above 100% reflected, sorry. If it's below 100% then it should stay the same.

@Mike Erwin (merwin) latest one I downloaded from the device manager 20.19.15.4624

I was reading this thread regarding how the Subsurface slider should work and wanted to give my two cents. Currently, you can't create a pure white material with mixed 0,1,1 diffuse and 1,0,0 subsurface like in fig1, because with the slider at 0.5, the shader converges to a total reflectivity of 0.5,0.5,0.5 . Would Renderman give that same result?

Crashes on Windows 10 + Intel HD 530

the bug is indeed gone in msvc2015 build

It still happens on latest buildbot, on my system at least. Everything was rendered on CPU

No problem. I think I provided enough evidence and explanations on why this is inconsistent and should be considered a bug, and I hope you take it into consideration.

Placing the DLL does work. Also, my driver was up to date, and for whatever reason, downgrading it to a previous version fixed the problem and it's now ogl1.4. Thanks.