[Dovecot] Duplicate Messages, Different X-UIDs?

[Joe Allesi -X (joallesi - Coyote Creek Consulting at Cisco)]

We're running into an issue where sendmail is only receiving one e-mail,
but after a client accesses the message via IMAP and moves it to another
IMAP folder, the message duplicates but each message has different X-UID
headers. Has anyone ever seen this type of anomaly before? Is it a bad
IMAP client, or a known bug?

Running 1.0.7

Thanks!