[fetchmail]--nokeep --flush not working on mail.comcast.com

[Robert Williams]

It appears to me that fetchmail is not
interacting with comcast's pop service
as expected.   The usual list pop clients
work fine to delete read messages from the server,
but fetchmail-6.2.5.5-1.fc4 fails to do this.

One of the local imap mail accounts
on a server that I manage
has been popping mail from mail.comcast.com
with a fetchmail crontab entry,
and over the past week we have seen a huge
number of duplicate messages.
The users inbox as 800Mb last Monday.
The crontab entry is
50 1 * * *      fetchmail --flush --nokeep -s -d 900
and the .fetchmailrc file is

# Configuration created Fri Jan 24 15:48:12 2003 by fetchmailconf
set postmaster "this-is-me"
set bouncemail
set no spambounce
set properties ""
poll mxxxxxx.usuhs.mil with proto POP3
     user 'hidden' there with password 'hidden' is 
'hidden@hidden.usuhs.mil' here
    smtphost  hidden.usuhs.mil
poll mail.comcast.net with proto POP3
     user 'hidden.hidden' there with password 'hidden' is 
'hidden@hidden.usuhs.mil' here

Anyone?

Best Regards,
Bob

-- 
Dr. Robert Williams
Department of Biomedical Informatics
Uniformed Services University
301-295-3568