these "permissions" and admin problems are gonna be major nightmares for some users, if early versions of OS X are any indication, and if vista was based on OS 10.2 and 10.3. it's a very nice of them to offer crippled versions of vista for much less money than "ultimate", but it means that most of the users won't ever know the full capabilities. AFAIK it ain't possible to buy a crippled version of tiger nor leopard. just the full consumer version for typical users.