FDru wrote:He means if you hit the spell button but don't have mana.
(edited) It's hard to really explain so just do this: go into dungeon and spend your mana, then hover your cursor over an enemy and press F. Your cursor won't change but you won't be able to attack that enemy normally until you right click or move your hero or something (right click does work but it needs to be a square other than the monster your mouse was over).
Correct, that is indeed the issue. Id have expected the failed spell attack to be canceled by hitting the hotkey again, but no. Appearently clicking the spellbutton again in inventory does work for cancelling it when failing because of low mana, so why not the hotkey too?