[horde] When deleting message : Copy not valid for POP3

[Cedric Tardif]

Hi,

I'm using 
<?php define('HORDE_VERSION', '3.0-cvs') ?>
<?php define('IMP_VERSION', '4.0-cvs') ?>

The problem is only for those who access my webmail with POP3 services.

When they try to delete a message they got a error Copy not valid for POP3

How do i correct this ?

Regards
Cedric