[SOLVED] transform.position not updating

I'm going through the survival shooter tutorial and I'm having an issue when using a nav mesh agent as described in the tutorial.

The tutorial provides the following code as well as video instruction on baking a nav mesh and creating a nav mesh agent. It seems to be working fine, I have an "enemy" character set up as a nav mesh agent as well as a nav mesh. The enemy is set up to follow the player using the following code:

usingUnityEngine;
usingSystem.Collections;

publicclassEnemyMovement : MonoBehaviour
{
Transformplayer;
//PlayerHealthplayerHealth;
//EnemyHealthenemyHealth;
NavMeshAgentnav;


voidAwake ()
{
player = GameObject.FindGameObjectWithTag ("Player").transform;
//playerHealth = player.GetComponent <PlayerHealth> ();
//enemyHealth = GetComponent <EnemyHealth> ();
nav = GetComponent <NavMeshAgent> ();
}


voidUpdate ()
{
//if(enemyHealth.currentHealth > 0 && playerHealth.currentHealth > 0)
//{
nav.SetDestination (player.position);
//}
//else
//{
//nav.enabled = false;
//}
}
}

The result is that the enemy character follows a path towards (0.0, 0.0, 0.0) and just stays there when it gets there. I added a Debug.log(player.position) and the log is just showing the same x, y and z coordinates as I move the player around the screen. I'm new to Unity so please let me know if there is anything important that I'm leaving out.

UPDATE:

Using a clue from another similar post, I added the following code to my EnemyMove code:

GameObject[] playerObjects = GameObject.FindGameObjectsWithTag("Player");
foreach(GameObjectplayerObjectinplayerObjects)
{
Debug.Log("Found object: " + playerObject);
}

Then I removed the Player tag from the player and I was still getting one line of output from the console. Now that I may have found the problem, how do I find the mistakenly tagged game object? I've gone through everything in the hierarchy with no luck. Is there another way to find it?

UPDATE 2:

It looks like this is a known bug in Unity. For some reason Unity had created a clone of the Player GameObject and FindGameObjectsWithTag() was returning the clone as well as the original. The solution was to close and reopen Unity.

Thanks