According to this article on CNN, the owners of the classic song from Disney's Pinocchio, "When You Wish Upon a Star," are suing the creators of Family Guy for what is being called an "unseemly spoof". Apparently, someone from the music publishing company Bourne Co. saw a repeat of the episode "When You Wish Upon a Weinstein" in which Peter determines that Chris would be more successful if he becomes Jewish.

It's a pretty slow reaction time on behalf of the Bourne Co. considering the episode was made sometime in 2002 (although it wasn't broadcast on TV until after the Season 3 DVD release in 2003). The parody was called "I Need A Jew". Apparently, by associating it with such an offensive topic the owners are concerned about devaluing the song.