[Mailman-Users] From header 'Bounces on behalf of' issue

[cary]

My upgrade from 2.0.x to 2.1 went smoothly except for the following FROM
header peculiarity. All my lists have the FROM address returning: 

	maillist-bounces at mailinglist.com; on behalf of; user
[user at user.com]

Shouldn't this return 

	maillist at mailinglist.com; on behalf of; user [user at user.com] ?

Is there anyway to remove the 'bounces' from the 'from' header or is
this the expected/planned from header format? 

Thanks, 

Cary.