I started playing Minecraft again on a new seed. And I found 2 villages. Both in a snowy area. Both with messed up farms because of the snow cover. I threw up a glass ceiling, plowed and planted, things are ripe, but the villagers wont work the fields, at all. They pick up food I throw at them so I think they are hungry but they do nothing to feed themselves like they used to a year ago, or whatever.
Am I missing something? Note that I am not trying to build an automated farm or anything. It's even regular village spawned fields. Just with a glass roof (and a few torches) I put up so it wouldn't get snowed over.
My farmers in my auto farms work just fine on xbox 360. It may have something to do with the biome. Since crops normally won't grow in snowy biomes the villagers may ignore farming behavior based on where they are.