I consider the risk low so haven't updated rpmfusion xorg-x11-drv-nvidia-387.34 for the stable branches, hopefully Nvidia will release fixed drivers for 387.xx later this month.

http://nvidia.custhelp.com/app/answers/detail/a_id/4611

The decision to wait is the safest choice IMO as switching to the 384.xx branch is likely to introduce regressions, those wishing to update can use 390.12 (beta) from the rawhide repo.