WORLDEDIT-2535 - Reported by _Sped

When using WorldEdit, all the commands seem to be broken and come up with the error:
java.lang.NoClassDefFoundError: net/minecraft/server/Block/

It also comes with an error in the console which can be found here: http://pastebin.com/ydNM36fd

I am using the current Dev. build of WorldEdit for 1.4.6.

Plugins: WorldEdit�, �NoSwear�, �Buycraft�, �Vault, �PermissionsEx�, �Multiverse-Core�, �Stargate�, �LWC�, �WorldGuard�, �SilkSpawners�, CoreProtect�, OpenInv, Timeismoney�, �Tombstone, �Modifyworld�, �ProtocolLib�, �Herochat�, �Enchanter�, �MobArena, �Essentials�, CommandSigns�, �EssentialsSpawn, �Multiverse-Inventories�, �TagAPI, �NameTags�, �VanishNoPacket�, �ecoCreature�, �DisguiseCraft�, ChestShop�