Calumet Specialty Products (NASDAQ:CLMT) and Southcross Energy Partners (NYSE:SXE) both held their distributions flat quarter over quarter. In a world where more than half of all master limited partnerships increase their distributions on a sequential basis, is this a move investors should take seriously or dismiss? In this video, Fool.com contributor Aimee Duffy talks to Tyler Crowe about what's going on at these MLPs.