[GRASS-user] Why does v.split convert 3D vector to 2D?

[Dwight Needels]

I have a 3D vector [test_3D] created using v.drape, confirmed as 3D  
with v.info. I used v.split to split the polyline at the vertices:

v.split input=test_3D output=test_3D_split vertices=2

The resulting vector [test_3D_split] is a 2D vector (i.e. it lost the  
z geometry data according to v.info, and v.to.db reports all slopes =  
0).

Is this intended behavior?

Thanks, -Dwight