I'm still seeing the issue in 4.7.06. Curvature works, selecting the materials works. Occlusion sometimes work, but on some models it crashes (consistently). I haven't been able to narrow it down to anything specific though. (OSX 10.9.4)
With one model, having a mix of surface and voxel models is an instant crash, changing everything to only voxels makes it sit calculating forever, no crash, but no results either.
It may be related to overall complexity. It seems to work fine up to around 10M tris.