Баги "Might and Magic: Heroes VI"

People noticed a bug: there's an item, like a bracer, that, when combined with something else, grants the "Regeneration" spell. When you equip it, the spell appears as it should. However, if you already have the general "Regeneration" spell, it automatically becomes a one-time-use spell per battle, and no mana is consumed for it (but you can't cast it if you don't have enough mana – what a paradox). Moreover, if you remove the item, the free "Regeneration" spell disappears, while the general "Regeneration" spell remains a one-time-use spell. It's complete nonsense, of course. And also, HELP!!!!!!!!!!!!!!!!!!!!!!!!!!! I really need help – how do I fix the bug that causes the game to freeze in the second mission for the Orcs??? Also, in the first mission, I upgraded "Tears," and in the second, everything crashes when it gets to the message that says something like "Blood Quests are not available"!=((((((((((