[Zope] limiting view access to acl_users

[gf]

Hi,
I am relatively new to Zope and have a question regarding acl_user folders.

I am trying to prevent 'view' access to an acl_users folder that I
have created in a non-root area of my website.

I have used the management interface Security tab to uncheck the
'Acquire permission settings' for the 'View' Permission and have
enabled View for the Manager role only.

I have taken the same actions for my root acl_users folder as well.

When I browse to http://mysite/myfolder/acl_users, I am presented with
a view of the index_html file contained within myfolder, with the 
<dtml-var title_or_id> 'output' indicating that it is 'User Folder'.

Why is acl_users making use of the container's index_html? Is there a
way to limit even View access to this folder?

Thanks.

-g