In an extensive legal malpractice and breach-of-contract suit lodged against the law firm formerly known as Hunton & Williams by a Wall Street investment firm, a state appeals court has upheld a Manhattan Supreme Court Commercial Division justice's dismissal of legal malpractice based on various theories. But, in a reversal, the court also ruled that part of the plaintiff's breach-of-contact claim against the law firm, now known as Hunton Andrews Kurth after a merger, must go forward.