Running Might & Magic 7 on modern computers.

There's one invisible monster in the arena ;)
Manticore: If you get it in a random encounter, the game crashes. Even if you kill it without targeting it with the cursor.
I heard that this problem can be solved with a patch from 3DO, but this patch is on the Bookworm website, but it doesn't solve the problem.
In general, it's not that bad, except that it's hard to get a promotion for the Knight. As luck would have it, only manticores appear ;)