Player::GiveMana() :

int prevMana;

if (mana == HexenDefs::MANA_NONE)
{
	return false;
}
if (mana == HexenDefs::MANA_BOTH)
{
	//	Give both types. Do this here to simplify other code.
	// Use bitwise or to make sure bot types are given.
	return GiveMana(HexenDefs::MANA_1, count) | GiveMana(HexenDefs::MANA_2, count);
}
if (mana < 0 || mana > HexenDefs::NUMMANA)
{
	Error("Actor::GiveMana: bad type %i", mana);
}

The last condition is WRONG! It must be:

if (mana < 0 || mana >= HexenDefs::NUMMANA)

Because Player.Mana[] has range of NUMMANA. In KA there already happened a bug because of this (plus mistake made by FB who sent forbidden value to this function <!-- s:wink: --><img src="{SMILIES_PATH}/icon_wink.gif" alt=":wink:" title="Wink" /><!-- s:wink: --> )

Fixed.