Don't find username on the main thread. Not friendly with partial names.

src/com/lishid/openinv/internal/IPlayerDataManager.java

@@ -16,8 +16,11 @@
 
 package com.lishid.openinv.internal;
 
+import java.util.UUID;
+
 import org.bukkit.entity.Player;
 
 public interface IPlayerDataManager {
     public Player loadPlayer(String name);
+    public Player loadPlayer(UUID uuid);
 }

src/com/lishid/openinv/internal/v1_8_R1/PlayerDataManager.java

@@ -101,4 +101,29 @@ public class PlayerDataManager implements IPlayerDataManager {
 
         return found;
     }
+
+    /* (non-Javadoc)
+     * @see com.lishid.openinv.internal.IPlayerDataManager#loadPlayer(java.util.UUID)
+     */
+    @Override
+    public Player loadPlayer(UUID uuid) {
+    	OfflinePlayer player = Bukkit.getOfflinePlayer(uuid);
+        if (player == null || !player.hasPlayedBefore()) {
+            return null;
+        }
+        GameProfile profile = new GameProfile(uuid, player.getName());
+        MinecraftServer server = ((CraftServer) Bukkit.getServer()).getServer();
+        // Create an entity to load the player data
+        EntityPlayer entity = new EntityPlayer(server, server.getWorldServer(0), profile, new PlayerInteractManager(server.getWorldServer(0)));
+
+        // Get the bukkit entity
+        Player target = (entity == null) ? null : entity.getBukkitEntity();
+        if (target != null) {
+            // Load data
+            target.loadData();
+            // Return the entity
+            return target;
+        }
+        return null;
+    }
 }

src/com/lishid/openinv/internal/v1_8_R1/SpecialPlayerInventory.java

@@ -82,7 +82,7 @@ public class SpecialPlayerInventory extends PlayerInventory implements ISpecialP
     public ItemStack[] getContents() {
         ItemStack[] C = new ItemStack[getSize()];
         System.arraycopy(items, 0, C, 0, items.length);
-        System.arraycopy(items, 0, C, items.length, armor.length);
+        System.arraycopy(armor, 0, C, items.length, armor.length);
         return C;
     }