[Dovecot] lazy expunge - how to unset deleted imap flag

[Colo Colo]

Hello,
I am using dovecot 1.1.13 in debian lenny with exim4 and I have Outlook 2007 clients. I have configured lazy expunge plugin.

User marks messages in INBOX for deletion then click "delete messages from server" then the messages are moved to .EXPUNGED
 folder which is correct but they are still marked with IMAP deleted flag which is bad cause when user marks another messages
 in INBOX for deletion and click again on "delete messages from server"  the messages which were in .EXPUNGE are gone forever.

Is there any possibility to change this behavior i.e. instead from:
move messages tagged for deletion to .EXPUNGE folder to: 
move messages tagged for deletion to .EXPUNGE folder and UNSET deleted flag ?

Thanx