Nothing ever changes in Hollywood. They think they want intelligent people to write screenplays and make creative decisions, but meanwhile they fly by the seat of their pants and often the dumbest movies are huge hits, almost by accident. So they keep making them. This was as true in 1930, just three years after the dawn of the "talkie," as it is today, and that's what makes Kauffman and Hart's play from that era, Once in a Lifetime, as ticklingly funny today as it was 80 years ago. ACT's newest production, and the opening play of the season, is a smart and spiffy revival of not-well-known play replete with camp and satire.