Minecraft wiki entry for Development_versions, associated text: Can now place things on top of fences and walls
Can now destroy blocks behind signs and torches
Fixed some issues with leaves
Mob spawners don't ignore torches anymore
Cacti can't be placed next to each other anymore
Leaves' and tall grass destroy particles are not gray anymore
Fixed a potential and very random crash
Fixed some situations where liquids could stop flowing
Fixed spawn position in multiplayer
Tabs in the Creative inventory don't have a small offset anymore