I'm afraid the behaviour martygreene describes whith moving messages to PST files is by design. See it like this, the Blackberry server 'monitors' your server side mailbox and if it sees a message has been moved from your Inbox to a regular subfolder, it will reconcile on the Blackberry. If the server sees a message is "suddenly disappearing" (because you're moving it to a PST file which the server doesn't monitor), it just doesn't remove the message in the BB's inbox... You notice the same when permanently (shift deleting) messages straight from your inbox, they won't be removed from your BB (because the server 'doesn't understand' where the message went). Sorry for the simple talk but I didn't know how else to explain
The workaround would be to move the message to a subfolder on the mailserver first, wait for the BB to sync up/remove the message from it's inbox, and then file it into the PST file.
Hope this helps!