The checks might not come in time for Christmas, but refunds could be arriving in the mail in a few months for millions of Californians who have already paid tripled car-tax bills. On Monday, soon after he is sworn in as governor, Arnold Schwarzenegger plans to roll back the higher vehicle license fee -- and will make the rollback retroactive to Oct. 1, the date the increase took effect, his aides said Wednesday. While Schwarzenegger had said throughout the recall campaign that undoing the car-tax hike would be his first action in office, he had left unanswered until recently...