Lowered the priority of the old command handler event because a number of plugins were using this event incorrectly. A new event, the command preprocesser event, has replaced the previous function of the original command event.

src/main/java/org/bukkit/event/Event.java

@@ -178,6 +178,13 @@ public abstract class Event {
          */
         PLAYER_COMMAND (Category.PLAYER),
 
+        /**
+         * Called when a player early in the command handling process
+         *
+         * @see org.bukkit.event.player.PlayerChatEvent
+         */
+        PLAYER_COMMAND_PREPROCESS (Category.PLAYER),
+
         /**
          * Called when a player leaves a server
          *