From Minecraft Wiki
December 1, 2011
11w48a is the second snapshot released for 1.1.
- Farmland can now only be trampled if the player jumps/falls on it; walking no longer affects it
- Mobs can similarly trample farmland by jumping on it, but not by walking
- Void fog
- Void fog has been removed in Creative mode
- Now have a 1/200 chance of dropping from oak leaves
1 bug fixed
- Taiga biomes now once again contain snow and ice.