[Bleeding] Event no longer implements Serializable.

src/main/java/org/bukkit/event/block/BlockDamageEvent.java

@@ -11,7 +11,6 @@ import org.bukkit.inventory.ItemStack;
  * <p />
  * If a Block Damage event is cancelled, the block will not be damaged.
  */
-@SuppressWarnings("serial")
 public class BlockDamageEvent extends BlockEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private final Player player;