MinecraftPortCentral/CraftBukkit — pull request #17 by micktu (2013-01-13 01:56:40+00:00)
Title: Branch 1_4_6, a fix for some of the Bukkit/Forge world conflicts.

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