Some enchantments not working/glitching?

--> IN THE NEW SNAPSHOT 15w31a <---
Enchanting works on only some items, such as swords and armor.(Picture 5)
When enchanting books, I only receive "Enchanted Book" instead of a book with a random enchantment now.(Picture 3,4)
Also bows will not enchant at all, and they eat up lapis and experience.(Picture 1 and 2)