MinecraftPortCentral/CraftBukkit — pull request #18 by micktu (2013-01-13 01:59:24+00:00)
Title: Unregister Forge dimension when unloading Bukkit world.

Calls DimensionManager.unregisterDimension() when unloading a world. Essential if Bukkit will create more worlds with the same ID in the same session.