It's hard to test a bit because all fonts have H and V values that are identical anyway.  But, any V value specified alone is basically treated as 0.0.

```
[x] H override of V:
[x]   H/V=7.000000: OK - 9 (allocated 0)
[x]   V=7.000000: OK - 9 (allocated 0)
[x]   H/V=11.000000: OK - 0 (allocated 0)
[x]   V=11.000000: OK - 9 (allocated 0)
```
(9 is the first font with 7, 0 is the first font with 11.)

-[Unknown]