Hmm, by the way, yes, we could try downgrading the version to 3.5 so that it works for everyone on Windows 7. I didn't think about that; all the testers had version 4 installed, apparently.
We could also add basic forgetfulness from the magic system.
Also, it seems that the hatred of monsters towards each other was not taken into account: Black Dragons/Titans, Efreet/Djinn, Angels/Devils, Air/Earth, Water/Fire. And also, the damage of psychic elementals to those immune to mind magic.