Minecraft wiki entry for Development_versions, associated text: Changes to the mechanics to make it better.
More rewards: treasure and junk.
Treasure: 6 items total, including enchanted fishing rods, enchanted bow, enchanted books, name tags, lily pads, saddles
Junk: 13 items total, including damaged fishing rods, Water Bottles, rotten flesh, string, leather, bowls, sticks, bones, tripwire hooks, ten stacked Ink Sacs, or damaged leather boots.