Mesh.RecalculateBounds

The documentation for the function contains this comment... "Assigning triangles will automatically Recalculate the bounding volume." Experimentally I am seeing differences if I manually call this after assigning triangles? mesh.triangles = newTriangles; Bounds b1 = mesh.bounds; mesh.RecalculateBounds(); Bounds b2 = mesh.bounds; if (b1 != b2) { Debug.Log("Bounds "+b1+" => "+b2); } Bounds Center: (19.5, 0.8, 19.5), Extents: (28.1, 0.8, 28.2) => Center: (19.5, 0.8, 29.4), Extents: (28.1, 0.8, 38.0) Is the documentation incorrect, or am I mis-understanding something? Paul