Several companies, including Starbucks, McDonald's, and Time Warner, are contesting the validity of decisions made by the National Labor Relations Board, due to a dispute over the legitimacy of President Obama's recess appointments to the board. An appeals court ruled earlier this year that the appointments weren't legal. As the case heads to the Supreme Court, labor lawyers are urging companies not to discount recent NLRB decisions or to make major changes to labor practices. More inside.