Happily. Meanwhile, is this the place for bug reports? I was posting here in the public forum mostly to see if other users had the same issue. I've written thousands of official bug reports when an official beta tester for Autodesk and Newtek over 20 years of doing VFX.
Here are the specs:
NVIDIA GeForce GTX 780 Driver Version 353.06
Intel Core i7-4770K 3.5GHz
32GB RAM
Anything else?
I might add, if I add yet another 4th viewer and view the same node there, THOSE controls do, in fact, render as green lines. Only the 3rd viewer renders the controls (poly splines) as black.
My workaround is to just add two viewers, ignore the 3rd and maximize the 4th.