Minecraft wiki entry for Development_versions, associated text: Reverted eating speed to 32 ticks (1.6 seconds).
Eating is now interrupted if something hits the player.
The player now naturally heals every 40 game ticks (2 seconds) instead of every 60 game ticks (3 seconds).
Natural healing drains food points 50% slower.
Reintroduced the rule that sprinting requires more than 6 points of food.