Fix for multi-stack adds

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java

@@ -209,7 +209,7 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
                     } else {
                         // More than a single stack!
                         if (item.getAmount() > getMaxItemStack()) {
-                            setItem( firstFree, new CraftItemStack(item.getTypeId(), getMaxItemStack()));
+                            setItem( firstFree, new CraftItemStack(item.getTypeId(), getMaxItemStack(), item.getDamage()));
                             item.setAmount(item.getAmount() - getMaxItemStack());
                         } else {
                             // Just store it

src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java

@@ -32,19 +32,19 @@ public class CraftItemStack extends ItemStack {
         this(type.getId(), amount);
     }
 
-    public CraftItemStack(final int type, final int amount, final byte damage) {
+    public CraftItemStack(final int type, final int amount, final short damage) {
         this(type, amount, damage, null);
     }
 
-    public CraftItemStack(final Material type, final int amount, final byte damage) {
+    public CraftItemStack(final Material type, final int amount, final short damage) {
         this(type.getId(), amount, damage);
     }
 
-    public CraftItemStack(final Material type, final int amount, final byte damage, final Byte data) {
+    public CraftItemStack(final Material type, final int amount, final short damage, final Byte data) {
         this(type.getId(), amount, damage, data);
     }
 
-    public CraftItemStack(int type, int amount, byte damage, Byte data) {
+    public CraftItemStack(int type, int amount, short damage, Byte data) {
         this(new net.minecraft.server.ItemStack(type, amount, data != null ? data : damage));
     }