The two big surprises in today’s Directors Guild of America nominations are the snubbing of Steven Spielberg for “War Horse” and the nod received by David Fincher for “The Girl With the Dragon Tattoo,” which is far from his best work. The other nominees are Woody Allen (“Midnight in Paris”), Michel Haznavicius (“The Artist”). Alexander Payne (“The Descendants”) and Martin Scorsese (“Hugo.”) Less surprisingly snubbed were Terrence Malick (“The Tree of Life”) and Tate Taylor (“The Help”).