I recently changed the auto-hide property of of my taskbar from "On" to "Off". Doing so caused all the icons on my desktop to get rearranged. The icons were rearranged in such a way as to clear out the bottom-most row.
Even with the bottom-most clearded out, if I toggle the taskbar between "Auto Hide On" and "Auto Hide Off" the vertical space between desktop icons changes a little. It appears that when in the "Off" state the vertical space between each row of icons is smaller. When the state is "On" the vertical space between each row of icons is greater.
Can someone explain to me what is happening and why?