I found some type of Bug with both the production (5160) and current beta (5540) of Parallels under Leopard 10.5. I am running in full screen mode - with Windows XP on a MacBook Pro - active applications are a CISCO VPN Client, MS Outlook 2003, MS Word. For no apparent reason, all of the sudden the VM does an unexpected quit - this seems to happen every 2-4 hours on me. Any ideas?