Bug in mailing lists; unfriendly to non-subscribers

[Tom H]

On Wed, Jul 7, 2010 at 1:30 PM, Todd Zullinger <tmz at pobox.com> wrote:
> Tom H wrote:
>> You (Todd) and others have the following:
>> from  Felipe Contreras <felipe.contreras at gmail.com>
>> reply-to      Community support for Fedora users <users at lists.fedoraproject.org>
>> to    Community support for Fedora users <users at lists.fedoraproject.org>
>> date  Wed, Jul 7, 2010 at 6:10 AM
>> subject       Re: Bug in mailing lists; unfriendly to non-subscribers
>> mailing list  users.lists.fedoraproject.org Filter messages from this
>> mailing list
>> mailed-by     lists.fedoraproject.org
>> unsubscribe   Unsubscribe from this mailing-list
>>
>> and hitting reply results in having the following in the to: field
>> Community support for Fedora users <users at lists.fedoraproject.org>,
>> users at lists.fedoraproject.org
>>
>> For Felipe, it is:
>> from  Felipe Contreras <felipe.contreras at gmail.com>
>> reply-to      Community support for Fedora users <users at lists.fedoraproject.org>
>> to    Community support for Fedora users <users at lists.fedoraproject.org>
>> date  Wed, Jul 7, 2010 at 8:44 AM
>> subject       Re: Bug in mailing lists; unfriendly to non-subscribers
>> mailing list  users.lists.fedoraproject.org Filter messages from this
>> mailing list
>> mailed-by     lists.fedoraproject.org
>> unsubscribe   Unsubscribe from this mailing-list
>>
>> and
>> Community support for Fedora users <users at lists.fedoraproject.org>
>
> It might be gmail doing this to you.  The reply-to and from fields
> don't match exactly, so perhaps they're "helpfully" addressing the
> mail to both.  My MUA (mutt) doesn't do this no matter how I reply
> (list-reply, reply, or reply-all).

I was just confirming what Felipe said about your headers.
It must be gmail because (1) if I choose "show original", your
reply-to field is ok, (2) Felipe is also on gmail, (3) Tim has posted
that he doesn't see this de-doubling on Yahoo.