I have noticed that on my server pistons does not update as they should... I cant make a double piston extender because when it retracts, the last piston just doesnt update. Piston - Piston Head - Redstone Torch - Block - It extends normally: But when retracts. Only after updating that piston it extends... Plugins: TimTheEnchanter, WorldBorder, WorldEdit, VoxelSniper, BKCommonLib, MyWorlds, Vault, JSONAPI, PEX, VoxelPort, WorldGuard, Zombes4Bukkit, Essentials, libpsanker, VoxelGuest, EssentialsSpawn, EssentialsChat Please help. Thanks in advance BUMP Found it! It is a bug in the whole CraftBukkit! EDIT by Moderator: merged posts, please use the edit button instead of double posting.