no moderation after changing email

[Cod3rs]

we're using Mailman v2.1. Our list has set
"default_member_moderation" to "Yes" and all new
members have the "mod"-value set correctly, but if any
of this members changes his email address via the
webinterface (/mailman/options/<list>/<email>) his
"mod"-value is no longer set and he's able to post to
the list without any moderation.

I haven't found anything in the archive, maybe someone
has a solution to this.

[http://sourceforge.net/tracker/index.php?func=detail&aid=681505&group_id=103&atid=100103]