Dropchances do not work in the snapshot

As i tried to spawn an entity with custom dropchances, the custom dropchances didn't work.

What I expected to happen was...:
I expected the mob to, when i opened it with NBT-edit, have it's dropchances set to 1.0.

What actually happened was...:
Instead, they were set to the standard value of 0.85 (and some more numbers)

Steps to Reproduce:
1. Place a command block
2. enter

summon Skeleton ~ ~2 ~ {Dropchances:[1.0,1.0,1.0,1.0,1.0],Equipment:[{id:268},{id:301},{id:300},{id:299},{id:298}]}

3. Power the command block
4. Kill the skeleton (and see it doesn't drop everything), or open the entity in a correct NBT-editor and see that the dropchances are still 0.85xxxx