"So, we figured out what the problem was - Rhino V5 changed the definition of a 'valid' mesh. Specifically, faces which are zero-area are now invalid. The problem is that when extruding a face, the first thing we do is change…"
"As far as I know, the only project that's using RhinoCommon in V4 is grasshopper, and it updates its own internal build. It might be possible to piggyback on that, but distribution seems like a problem. I'm sure David Rutten…"