About three weeks ago I switched our office from GW7 to GW8.0 and then four days ago bumped up to GW8.0.2 (HP3). With this build, one user is seeing some of his mail spontaneously moving from the mailbox to the trash. It happens periodically and it happens with read and unread messages. It is not affecting all of his mail, just some of it and with no apparent pattern. This was not happening with the 8.0 version.

What is the best approach to remedy this?