Mouse deltas

The “Receive Mouse Delta” node doesn’t always have 0 on the output even when the mouse is stationary.
The documentation says this can occur when the point is on the edge of the window, but actually can occur when the point is inside the window.
If the node isn’t associated with a window the residual value can be as high as 6 pixels.
Anyone have a nice solution to handle this … haven’t found one myself yet.

See the related bug report.