Situation: moving the mouse over the map, included unexplored parts of the map.
Excepted results: popup window with information about the already revealed cities, heroes, resources... but not of those that hasn't been revelead yet.
What really happens: See pics.



Haven't tried deep terra incognita, just near the borders so I'll update as needed. In any case, little exploration exploit even if it's just in the border of the revealed area.