In villages that have a Farmer, I often see bread at another villager's feet in a wheat field. I can pick it up, but the villager apparently cannot. (If the gift were intended for me, I'd expect it to be placed in a nearby chest or, failing that, thrown directly to me.) NBTExplorer data shows that many villagers are carrying both bread and raw wheat; probably the bug is that the receiving villager counts wheat as bread when deciding whether he needs food, but the donor does not. A workaround may be to have villagers craft bread whenever they have 3 wheat, rather than waiting until someone is hungry.