Sudden doubling of nearly all messages

[Alan Ristow]

On 07/21/2012 12:48 PM, Dave Angel wrote:
> Has anybody else noticed the sudden double-posting of nearly all
> messages in the python mailing list?
[snip]
> I'm using Thunderbird 14.0 on Linux 11.04, with mail configured for
> non-digest mode.  I read the messages in threaded mode.
>
I'm pretty sure it is Thunderbird-related -- I have had this issue 
before as well. Unfortunately, I cannot remember how I solved it. It 
seems like there was a particular box that needed to be checked or 
unchecked in the IMAP settings for the mail server, but I can't be sure 
anymore.

Alan