In the comments over at Holy Whapping, there is a little debate over whether a bishop should ever cross his stole over his chest in the manner of priests. The answer is plain, NEVER!

A priest crosses his stole over his chest in order to place a cross on his heart. A bishop, who by right wears a pectoral cross (which should always be under the chasuble, by the way), does NOT cross his stole over his chest because the pectoral cross serves the purpose of having a cross on one’s heart. The good Bishop of Rome, wearing a cope, shows the proper usage for a bishop:

As a completely random aside, the Vatican is in need of some better looking microphones, wouldn’t you agree?