Card instructions vs common sense question

[Brf]

This is answered in the FAQ:

Originally Posted by FAQ

Q. Can I Curse the Munchkinomicon? What happens?
A. If the Curse forces the Munchkinomicon to be discarded, it goes back to the top of the Treasure deck, as always. If it is a Curse that makes its bonus into a penalty, or has some other persistent effect, that effect stays on the Munchkinomicon until it returns to the Treasure deck, as stated in the rules. However, the Munchkinomicon is not bound to a player even if it is hit with a Curse that says so.

So the Munchkinomicon would transfer to the player that played the curse, and still retain the penalty imposed by the curse.