As near as I can tell, ANY entitydata applied to ANY entity being ridden will teleport both riding and ridden below bedrock if not to 0 0 0.
Working for me sometimes but not others... works with just the one stone block but not a whole array of items...
gnat
As near as I can tell, ANY entitydata applied to ANY entity being ridden will teleport both riding and ridden below bedrock if not to 0 0 0.