French Postcards rings both comic and true. The believable fresh-faced characters are young naives from American colleges spending their French-English dictionaries they compulsively seek out hundreds of monuments romanticize the nomadic artist's life and look for grown-up love. The French tutor them well as befits their reputation. Jean Rochefort is the harassed headmaster with a hankering for affairs and Marie-France Pisier is his very sexy wife. Watch for a newcomer named Debra Winger and another-Mandy Patinkin.