[Dovecot] POP users see duplicate mail after upgrade (was Re: One user having reproducible IMAP issues)

[Timo Sirainen]

On Sun, 2007-03-18 at 18:22 -0700, Alex Boster wrote:
> Is there a way to upgrade from rc26 to rc27 without causing our POP  
> users to see duplicate new mail?  That was a problem last week with  
> the 0.99 to 1.0rc26, and the other admin on the box is reluctant to  
> upgrade again if that is going to happen again...

I guess you used a different pop3_uidl_format. See
http://wiki.dovecot.org/UpgradingDovecot

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