[Mobhack]

You can load a map and damage it in a scenario, since scenarios have units, which damage is a sub-set of, same with mines, victory hexes etc. But if a map is saved to a map slot, it doesn't have any units there since its not part of a scenario.

That's about all I recollect on the matter regarding maps.

It should be stripping all the information when saved off as a map though.