Bukkit

v2.0

• New config option names to make it more clear what they actually do. (Delete your Wither directory in your plugins folder and generate a new one)
• Fixed issue where Wither would, on rare occurrences, still break blocks.
• Fixed exploit where pistons could be used to spawn a Wither in certain situations.

v1.7

• Added option in config for WorldMessage that allows you to set the message a player receives when they are in a world that does not allow Wither spawning.
• Added better error handling.
• Fixed issue where an NPE would be thrown if an Entity no longer existed.

v1.6

• Added command /wither reload that will allow you to reload the config.yml from in game.
• Added permission node for reloading the config.yml wither.reload
• Added option NoWitherExplosionDamage (default is off) to disable explosion damage caused by the Wither. This will stop all damage to entities caused by the Wither explosion. That means paintings, item frames, mobs, and players won't be damaged by the initial spawn explosion and the skull explosions. Players and mobs will still take damage from direct hits by the shooting wither skulls.

v1.5

• Custom message (supports color codes) defined in config.yml when a player is denied the ability to spawn a Wither.
• Added option to completely disable Wither spawning in certain worlds. See the new config.
• Now blocks the Wither from breaking paintings when it runs into them. (Skulls that are shot by the Wither still break paintings, but I am working on that!)

Note: Please delete your config.yml and let it generate a new one. I have changed the name of some of the options.

v1.4

• Fixed issue where Wither would still cause damage to blocks by flying through them.
• Please delete your config.yml and let the plugin generate a new one.

v1.3

• Fixed issue where skull explosion would cause damage
• Added config option for completely disabling Wither spawning

v1.1

• Removed temporary fix for CraftBukkit bug.

v1,0

• Initial Release

If you have BlockWitherSpawn set to true and you attempt to create a Wither it will result in a glitch where soul sand appears invisible. This is a CraftBukkit bug.