Mobs drop different amount of common items than before.

In 1.8.8 wither skeletons could drop 0-1 (0-4 with looting III) coal and 0-2 (0-5 with looting III) arrows + rarely head.
In 15w43a they can drop 0-3 (0-6 with looting III) coal and 0-3 (0-6 with looting III) arrows + rarely head.
In 15w43b they drop 0-2 (0-5 with looting III) coal and 0-2 (0-5 with looting III) arrows + rarely head. Still one more coal than before.

In 1.8.8 squids could drop 1-3 (1-6 with looting III) ink sacs.
In 15w43b they drop 0-2 (0-5 with looting III) ink sacs.

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Fixed:
In 1.8.8 ghasts could drop 0-2 (0-5 with looting III) gunpowder and 0-1 (0-4 with looting III) ghast tears.
In 15w43a they can drop 0-3 (0-6 with looting III) gunpowder and 0-2 (0-5 with looting III) ghast tears.
Fixed in 15w43b.

In 1.8.8 skeletons could drop 0-2 (0-5 with looting III) bones and 0-2 (0-5 with looting III) arrows.
In 15w43a they can drop 0-3 (0-6 with looting III) bones and 0-3 (0-6 with looting III) arrows.
Fixed in 15w43b.

In 1.8.8 zombie pigmans could drop 0-1 (0-4 with looting III) rotten flesh and 0-1 (0-4 with looting III) gold nuggets.
In 15w43a they can drop 0-2 (0-5 with looting III) rotten flesh and 0-2 (0-5 with looting III) gold nuggets.
Fixed in 15w43b.