Hi,
Installed V6 SP1, rebooted, then Win2003 SP1, then all Win updates, and all went on fine.
Fixed some problems we had with a broken user archive.
We seem to have a lot less MAPI errors showing up in the log now, but that may be because we also moved most Exchange users over to a new clustered server.
Clients have not commented on any change in speed, but do they ever unless it's slower.
Nick