Space Shooter Tutorial - Transform Direction

I've been following along to the Space Shooter tutorial and enjoying it quite a bit. I hit my first snag on part 7, where we create a bolt. I noticed that when creating the collider, the tutorial sets it to z-axis. However when I do this, the collider shape does not fit the bolt. So I leave mine set to y-axis.

When I launched the game, I noticed the bolt would appear on screen for a second, then dissapear. I'ts y and z axis values continue to change, so it's clearly off camera and moving around. I've had to change my code so that instead of using transform.forward, I'm using transform.up, and its working fine now.

I cant work out why I would be having this issue/difference to the videos. I'm sure its quite simple, but very keen for the answer. Any ideas here? Here is the code:

using UnityEngine;
using System.Collections;

public class Mover : MonoBehaviour
{
public float speed;
void Start ()
{
rigidbody.velocity = transform.up * speed;
}

}

 

I'm having the exact same problem! Please post if you figure this out!

 

Same here! How is it that nobody has gotten a fix for this already?