Issue of nurses salaried status was subject of lawsuit in 2012 due to excessive amount of work hours - and nurses wanting to be hourly to be compensated for the amount of hours they work. It settled an was sealed after about a year .. which may mean it was settled to make it go away.
http://www.leagle.com/decision/In%20FDCO%2020121128I40/SCHROEDER%20v.%20HUMANA%20INC.?