The Coen brothers give high marks to Paul Newman’s performance in The Hudsucker Proxy, but his gourmet foods don’t seem to be making the grade. ”I stay away from his popcorn,” says Ethan Coen. ”I don’t really like the stuff.” And brother Joel just adds insult to injury. ”I don’t think I’ve tried the spaghetti sauce.” Newman’s reaction to their reviews? ”Joel and Ethan (better) not get scratchy with me,” says the actor, who insists he and his wife, Joanne Woodward, eat the popcorn ”at least once a week.” No word on the sauce, however.