Using: Code (Text): [INFO] This server is running CraftBukkit version git-Spigot-430 (MC: 1.4.7) (Implementing API version 1.4.7-R0.2-SNAPSHOT) When I place a normal pig spawner and then use a plugin that changes the spawner type it results in the spawner changing to the specidied type, but it still spawns pigs. The pigs will not stop spawning even after removing the spawner. They will keep spawning out of thin air where the spawner used to be. This worked just fine on Spigot #397 Edit: Just tested with no plugins on build #430. Started a brand new map with no plugins and placed a pig spawner. Then destroyed the pig spawner and pigs will keep spawning. This bug is present with 0 plugins.