Bukkit

Version 14.0d notes:

• Monsters can now only place blocks if they are standing on a block or swimming.

Version 14.0c notes:

• Added an option to disable Skeletons, WitherSkeletons, and PigZombies, according to each mob, from spawning with default equipment (allowing other plugins to set it instead)
• Fixed Spider mega-aggro, including a bug where silverfish would spawn at players' feet.

Version 14.0b notes:

• Fixed an old bug where PigZombies spawned without swords.
• Fixed a bug where turning off nerdpole/airbridge deaths would result in the feature not creating blocks.
• Fixed a bug where monsters could nerdpole through walls diagonally from above players. This could potentially still exist on 1-stair thick rooftops.

Version 14.0a notes:

• Fixed an old bug where zombies could not pillar in lava or water.
• Fixed a bug where zombies could catch themselves falling off an air bridge using a block, far below the bridge.

Version 14.0 notes:

• Converted Zombie Corpse Piling into Monster Nerdpoling and Air Bridging! Please update your configs to the new lines.
• Monsters will now build smarter with pillars and behave like players with blocks in their inventory to kill you.
• Once the delay period has passed, monsters will nerdpole up at full speed.
• Monsters can detect 2 block high walls and climb over.
• Air bridging will allow monsters to build horizontally through the air to reach players, moving the monster along its bridge and extending it.
• Air bridges can be built as a downward staircase, especially if monsters hit a deadly cliff dropoff.
• Zombies, Skeletons, Creepers, Wither Skeletons, and PigZombies may individually be enabled in the Advanced Properties
• The Material used for building is the same for all mobs
• You may still use this functionality as corpse piling with bridging disabled and "Kill the monster when it nerdpoles or airbridges?" enabled.
• This functionality is still compatible with CreeperHeal, and thus monster nerdpoles and bridges can be creeperhealed.

• Added a protection method for players from exploding skeleton super arrows. When enabled, this will prevent arrows from exploding within a certain radius from players.
• "Advanced Monster Properties.Skeleton.Super Arrow Player Protection Radius"