Was looking to see how C5 deals with inherent UVmapping in a mesh being edited. Created and mapped cylinder and square, applied checkerboard pattern, and started tesselating, filleting, extracting around, and subdividing. All the edge tools respected the previous UVmap; interpolating within the existing UV surface. Subdivision bollixed the map on the cylinder but was fine on square -- and unlike C4pro, I wasn't able to get around the problem by exporting the subdivided cylinder then re-importing. I'll have to try again on a production mesh to see what the issue was. Also crashed the demo, twice, within 30 seconds of starting it up. Neither crash seems to be addressed specifically in the update, but I will refrain from reporting on them until I've run that.