Possibly fixed conflicts with other plugins since dynamic command registration was added.

src/main/java/com/sk89q/worldedit/bukkit/WorldEditPlayerListener.java

@@ -90,7 +90,7 @@ public class WorldEditPlayerListener extends PlayerListener {
 
         if (split.length > 0) {
             split = plugin.getWorldEdit().commandDetection(split);
-            split[0] += "/";
+            split[0] = "/" + split[0];
         }
 
         event.setMessage(StringUtil.joinString(split, " "));