Blame Conan O'Brien. He put Julia Louis-Dreyfus up to it when she appeared on his show Tuesday night and he reminded her that, when Tina Fey beat Julia for best comedy actress at the Emmys, Tina gave Julia most of the credit. So this whole idea of swiping Tina's Emmy started kind of innocently, maybe even kind of like a practical joke . . . till . . . well . . . the inevitable plot complication.