A terminology problem here Kino, which is my mistake. Since my computer is normally only used by me, I have set automatic login. Syst Prefs -  Accounts shows my name and administrator. Under that is "Guest Account Disabled", as you say. I am sure this is default behaviour of OS 10.6.4.

The login window, which I do not normally see, is similar to yours.

As I am the only user, I do not need the Shared folder:   Macintosh HD - Users - Shared. 
But this is another thing that always reappears after trashing.

Doug

On 14 Sep 2010, at 08:54, Kino wrote:

> On Sep 14, 2010, at 3:45 PM, Doug Browne wrote:
> 
>> I never thought about it before, but I also have 'Guest Account Disabled' under my name.
>> I have just run Kino's instructions below, but after a restart 'Guest Account Disabled' was still there.
> 
> Do you mean you see it in the login window? Mine looks like this.
> <http://images.macworld.com/images/legacy/2006/08/images/content/login2.png>
> 
> If it is in the Accounts System pref that you see "Guest Account Disabled", it is normal.
> <http://db.tidbits.com/resources/2009-10/Disable-guest-account.png>
> 
> But I don't know for sure if the login window's showing "Guest Account Disabled" is really odd or not. Perhaps that is the default behaviour for those who have enabled just a single account? Since 10.6.4, maybe. I'm and have been running my Macs always with two or more accounts enabled and I have never seen the login window of anyone else's Mac.
> 
> Also perhaps whether you have /Users/Guest or not would make a difference. If you have disabled Guest Account, I think you can trash it (you will be asked to enter your admin password) and empty the trash safely.
> 
> 
> Kino