setting up replication

[Johannes Rußek]

hello everybody,
i'm trying to replicate an existing imap servers over to a new one, this
is basically fedora core 6 to rhel5.
i've set up the replication as per the howto and it appears to basically
work. however, when sync_client reaches the point of creating a mailbox,
i get the following error in the log:

sync_client[30485]: CREATE received BAD response: Unexpected extra
arguments to Create

is there anything i am doing wrong?
regards,
Johannes