Outlook PST corruption when used over VPN

[Ben Griffin]

I have Outlook 2002 configured with POP account, no
exchange server, on my laptop which is plugged into the
LAN at the office. I often take my laptop home and
connect to the office via VPN over a broadband
connection. I occasionally get Outlook warnings that it
could not send/receive and I've had two corrupt PST's in
the last month. My pst file sizes at corruption have been
200MB and 49MB. Any ideas on what may be causing the
corruption and how to prevent it?

Any ideas appreciated. Thanks!