dovecot - Nov 2005 - forcing a default namespace

According to the Dovecot documentation, a "default namespace" is
defined by
simply configuring the namespace with an empty prefix, as in:

namespace private {
   separator = /
   prefix = 
   inbox = yes
   hidden = no
}

But my experience has been that this doesn't provide a true default, and
that this namespace will only be selected when the client actually provides
an empty ("") prefix.  Is there a way to configure a default namespace
that
will always be chosen no matter what prefix the client provides, as long as
there isn't an explicit match?  I'd like to be able to have clients find
mailboxes in a particular location no matter what they provide as their
folder prefix.

Thanks very much,

-- 
Glenn Leavell <glenn at usg.edu>
Office of Information and Instructional Technology
Board of Regents of the University System of Georgia