mob spawner ignores preset spawn coordinates

When I set the spawn coordinates for a spawner
(like this: Pos:[0:-372.0d,1:34.0d,2:-592.0d])
it doesnt spawn the mob at these coordinates -372 34 -592.
Instead it spawns the mob directly above it.

Befor 14w41a/b it worked perfectly, now it's broken.
Is a huge issue for mapmakers!