On the current episode of the all-new Unnatural Acts of Opera, the Apocryphal Opera Anecdote Theatre of the Air presents the two-act radio drama “Adelina Patti’s Shoe.” Also in this episode: La Cieca spills the beans about the Met’s planned German repertoire through 2012. Oh, and did she mention Act 2 of Der Barbier von Bagdad, starring Sena Jurniac, Rudolf Schock, and Gottlob Frick? Unnatural Acts of Opera.