The Pope has a problem with "seduction of the young" by Harry Potter

It is good, that you enlighten people about Harry Potter, because those are subtle seductions, which act unnoticed and by this deeply distort Christianity in the soul, before it can grow properly.

From a letter by then-Cardinal Ratzinger to a Catholic Harry Potter critic,
He should know about the seduction of the young. He is, after all....

(Thanks to John Stewart on The Daily Show for suggesting a context within which to understand the Pope's concerns.)