Just for your information really
Today, Vray Next beta 2 was announced and I have downloaded it.
However, I have now decided to wait until Vray Next and FP 6 are both final. I took the risk of installing FP 6 on Max 2014, with 3.60 and all was eventually ok, after reporting a few glitches, apart from the little problem of the vertical presets library, not picking up it's materials, everything else is working just great, At least for me anyway. Though some have problems with IPR etc, with my workflow, that isn't really a problem...
From the change log, there is only one mention concerning Forest Pack. In the Bug Fixes section, it reads
V-Ray: Crash when calculating light cache in scenes with Forest Colour texture with multiple maps;