ID 472864 - Vertex normals curve from mesh instead of creating straight lines.

Problem summary
Vertex normals curve from mesh instead of creating straight lines.

Customer reported version
modo.15.0v1 

Customer reported platform
windows10

Steps to reproduce

1) Launch Modo and open attached scene.

2) Select Top or Side view for Viewport perspective.

3) Go to View > Show Vertex Normals.

4) Vertex Normals are skewed from the edges of the mesh at curves.

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Expected behaviour
The vertex normal guides should be straight lines from the edges of the mesh.

Actual behaviour
The vertex normals are curved.

Workaround
Unknown. 

Reproduced by support
15.0v1 - Windows 10
14.2v1- Windows 10
14.1v1- Windows 10
14.0v1- Windows 10
13.0v1- Windows 10
12.2v2- Windows 10


Earliest version tested

12.2v2 - This issue appears to be in all versions of the product