Make smoothing work on a sub-pixel level.

[BombchuLink]

Movements are choppy for layers with low movement speeds, and move full pixels at a time when you move the mouse slowly.

The primary reason I installed this was just to have one background layer that moves a few pixels as you move the mouse across the screen, but I discovered that the movements are not smooth and instead snap to the nearest pixel.

Smoothing doesn't really help, since it actually speeds up movement, and requires a base speed to be decently high enough to work. It doesn't do any processing on a sub pixel level to keep things looking nice.