Phantom Messages in Read User Mail

Webmin/Servers/Postfix Mail Server/Read User Mail:

When I go to this interface there are several users for which the interface says the server is holding small amounts of mail (in the range of 10k to 40K) but when I click on the username the interface shows no messages at all in any of the user's folders (which is what I would expect for those accounts). I have logged in via Usermin for one such user and verified that that interface shows no messages in any of the user's folders.

Is this a bug? Is there a way I can correct the porblem?

Status: 
Closed (fixed)