The latest word on Woody Allen is that he's losing it. Insulated from the rhythms of contemporary life, which gave his work a trendy appeal during the heyday of Annie Hall and Manhattan, Allen has become less funny and more thoughtful. To his detractors, it's a bum trade-off. They're likely to be particularly pissy about Shadows and Fog, a comic lament that is purposefully and defiantly out of step. Shot in black and white in a New York studio meant to represent a middle-European city during the…