The property editor allows you to set the velocity of any element to a non-integer. That does not seem to work in the console anymore. I've tried the following:

!set vx/vy <element here> 0.5

!set vx/vy <element here> .5

But they set the horizontal/vertical velocity to 0 each time. Also,

!set vx/vy <element here> -0.5

!set vx/vy <element here> -.5

Sets the velocity to 0 as well, and

!set vx/vy <element here> -1.5

Sets the velocity to 1.

Please fix this.