Every serious director seems to have one frivolous gem of a comedy in him. Bergman had Smiles of a Summer Night. Hitchcock had Mr. and Mrs. Smith. This is von Sternberg's. The sometimes starchy "Miss Grace Moore" is relaxed and charming. Kriesler's tunes are as buoyant and sleek as the decor. Rich and sweet as a Viennese pastry and total escapism -- if one can forget the sad fate of the real-life Cissy who was mistreated by husband and mother-in-law and eventually assassinated. Another Hollywood deviation: Cissy was noted for her gorgeous hip-length black hair. Moore has short blonde curls. Oh, well, forget such petty details and let's have another delicious, delirious waltz.