NAPA -- While many fans, players, coaches and longtime observers are wringing their hands over the NFL's replacement officials, rookie Raiders coach Dennis Allen is not losing any sleep over them.In fact, Allen is paying the prospect of entering the regular season with replacement refs no mind at all."I really don't have a thought on it," Allen said Thursday. "To be honest with you, our focus is on our football team and how we're going to get better. And we're going to play the games when the games come up and that's all that we can control. So that's all we're really worried about."In their 3-0 exhibition-opening loss to Dallas on Monday, the refs were not an issue for the Raiders. Nor were penalties.Yes, it is an extremely small sample size, but a year after setting league record for penalties (163) and penalty yards (1,358 yards), the Raiders were dinged for just five penalties for 37 yards."The mental errors on the fieldwere down," said defensive tackle Tommy Kelly. "The technique? We can fix the technique. But we cut down on the mental errors and the penalties, man, people are going to have a hard time dealing with us."No matter who the referees are, right?