documents folder redirected rename question

Environment:
- Win2003 SBS, SP1 domain, native mode - Users' Documents folders manually redirected to the server on each client (read: not using a GPO, because I don't do this on all the clients...just the two I normally use) in the following manner:
\\server\users\user_1 \\server\users\user_2
- Until I installed WinVista Beta 2, each client was WinXP, SP2 - WinVista Beta 2 client is installed under VMWare and joined to the domain
What Happened:
When I redirected the documents folder properties on the Vista client for user_1 to \\server\users\user_1, the user_1 folder on the server was apparently renamed \\server\users\documents, all of user_1's documents appeared under that documents folder, and the user_1's folder was empty. The reason I say "apparently" is because the process was near-instantaneous, so with 3gb of data files, I don't think the files were moved during the process. It seems to me there shouldn't be any "arbitrary" renaming of folders as part of folder redirection.
I have only attempted this process once, but before I spend much time on it was wondering if anyone else encountered this? I am uncertain if this can be quantified as a bug or normal operation.

Rob