[Dovecot] Phantom email message

[Marc Perkel]

Got sort of a strange problem on one email account. Everything works 
fine with Thunderbird/IMAP showing the correct unread message count. But 
on my DroidX smartphone one of my email accounts always shows one unread 
message, but I can't bring any unread messages up. It's like there's 
something there making it think there's a message when there isn't.

The email client is K-9 mail

Anyone have any ideas?