Update for 1.4_00_01 -- if you bypassed Bukkit, you will most likely break.

src/main/java/org/bukkit/craftbukkit/block/CraftChest.java

@@ -32,7 +32,7 @@ public class CraftChest extends CraftBlockState implements Chest {
         boolean result = super.update(force);
 
         if (result) {
-            chest.i();
+            chest.update();
         }
 
         return result;