These changes only affect development builds. Spigot build 249 is based on the latest CraftBukkit Beta and as such is the build which should be used. Plugins will update and these changes will be better for everyone in the long run. Spoiler: Continue Reading Sorry guys, but I need to do this too keep myself sane, and to stop you from spamming the forums. Over the last few builds there have been at least three breakages in the Bukkit API. These breakages are controlled completely by Bukkit, so there is nothing we can do about it. Your best defence is to update your plugins or downgrade to a build prior to the 1st of December 2012. The first change which can be found at: https://github.com/Bukkit/Bukkit/commit/49690f9620b7ed1ed9769cec35d095a3cac33ab0 Details with the changing of the BlockFace / Direction enum. The fact that these directions, well point to the wrong directions, has been a common law feature pretty much since Bukkits inception. You may experience symptoms of this breakage if stuff is rotated oddly, or shop signs, and Lockette / Deadbolt locks do not function. All plugins known to be affected by this breakage have updated. The second change is affecting the most users, found at https://github.com/Bukkit/Bukkit/commit/e468a8b391336f292d3642ffa4c45b4600e91b64: This change alters the return type of the EntityBlockChange event. Any plugin using this simply needs a recompile. There are only about 60 plugins which will be affected by this change. You can be reasonably sure any block logging plugin will be broken, as well as any protection plugin (WorldGuard) The error will look something like: Caused by: java.lang.NoSuchMethodError: org.bukkit.event.entity.EntityChangeBlockEvent.getEntity()Lorg/bukkit/entity/LivingEntity; The third change: https://github.com/Bukkit/CraftBukkit/commit/8f12382e8efc8c39a919af9180dd884caf3720ff Only affects plugins which have been bad, and bypassed the Bukkit API. This represents approximately 1 in 11 plugins, so you can be reasonably sure 1 or 2 of your plugins have broken. So I again ask you to kindly remind your friendly plugin authors to update their plugins, and keep both these forums, the Bukkit forums, and issue trackers clean of these useless help requests.