Mirrored (Duplcate) Mail Document in Inbox

We have a user using 8.01 In his inbox the second to last email is always duplicated. If he deletes the bottom message, the dupilcated then becomes the new second last email and there is only one copy, the UNID’s and replicaID’s are identical. In my search through this forum i found one other post having the same issue and his operating system was Windows Vista.

Just to note we have others using LN 8.01 with the identical configuration and OS who are not having the same issue.

Is there anyone else experiencing the same problem is there a solution to resolving this problem?