[Samba] Roaming profiles question

[Dave Hopkins]

I have  Samba 3.014a running.  If I use the standard profiles definition:

[profiles]
    path = /opt/samba/profiles
    writeable = yes
    browseable = no
    create mode = 0600
    directory mode = 0700

then everything works fine.  But changing just the path to
path = /home/%U/profiles
breaks it completely.  I can curious why this doesn't work.  The user 
that is logging in owns their directory (%U) so why does windows complain?

Dave Hopkins