Playing on Halloween (10/31/13) and I really enjoyed the Easter Egg that a certain % of skeletons and zombies appear with pumpkin and jack-o-lantern heads.
However, when a baby zombie appears, the pumpkin appears to float above the baby's head (where a normal zombie's head would be).
I'm reporting this as a bug because I'm guessing this is not desired behavior.

If I were to suggest a solution: baby zombies should not get pumpkin heads on Halloween. Getting those heads on full grown zombies and skeletons is cool enough.