Over the last seven years, Mark Knopfler and Emmylou Harris quietly recorded an album by stealing "a few precious hours of studio time here and there," as the ex-Dire Straits singer/guitarist puts it. Good thing they kept it largely under wraps--expectations would have pushed through the clouds, especially as Knopfler conjured 10 of the 12 cuts, and Harris, who writes potently, but little, contributed two ("Love and Happiness," "Belle Starr"). Yet now that it's here, All the Roadrunning--while beautiful--seems somehow underwhelming, and without a true centerpiece. Anyone familiar with the artists' famous catalogues would expect the repertoire to be poetic ...