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“Frances Ha” is a comedy about youthful haplessness trying to find its hap. The movie has been shot in lustrous black and white and it stars Greta Gerwig, with whom it is hoped you will be as enchanted as the film’s director (and Gerwig’s significant other), Noah Baumbach (”The Squid and the Whale,” “Greenberg”).
Frances is yet another of the actress’s adorable ditherers, turning the corner of her late 20s and shocked that her friends have decided to grow up. There’s only so long you can watch an amorphous blob, though, before you want her to get on with it. The movie’s a love letter to an actress and her character, but by the end you may feel like an intervention is more in order.