Office 2003 renames "My Documents" to username's Documents, why?

I support an Active Directory with a mixture of W2K and XP Pro workstations.
We use Roaming profiles and Group Policies to minimize the amount of roaming
profile that is copied to the network. Group Policy provides for an 'exclude
directories in roaming profile', so I added to the default, "My Documents"
and My Documents\My Pictures". This has worked fine with W2K and Office
2000. Now I find that with my XP Pro and Office 2003 PC's, the directory
gets renamed as username's Documents, both in the local copy and the network
copy of the roaming profile (if network logon ID is abc, then the directory
is called abc's Documents).

Effectively that breaks my ability to support and minimize the size of the
network copy of the roaming profile as I cannot prevent the "username's
Documents" folder duplicating on the network copy of the roaming profile.

I also spotted that W2K can work with this newly renamed document folder,
believes it is "My Documents" and will remove it (inline with Group Policy)
if a XP user logs on and off a W2K PC.

I don't want to use redirection, or offline folders, or change anything. I
just want Office 2003 to stop renaming the folder. I know it's Office 2003
doing this as a check proved it. Microsoft's knowledgebase doesn't seem to
have anything on this (bloody difficult to find most things, unless you are
bang on with a keyword!).

Terry Robb
New Zealand