dsync unstable? (other strange detail)

[Timo Sirainen]

On 29 Jun 2016, at 00:53, Heiko Schlittermann <hs at schlittermann.de> wrote:
> 
> Hi,
> Timo Sirainen <tss at iki.fi> (Di 28 Jun 2016 23:30:38 CEST):
>>> 
>>> On successive runs of the above command I get:
>>> 
>>>   dsync(heiko): Warning: Deleting mailbox 'Serververwaltung.Mailinglisten Anforderung': UID=16 GUID= is missing locally
>> 
>> This means that on Dovecot side there are messages after UID=16, but either:
>> a) UID=16 was expunged from Dovecot side or
> 
> On the dovecot side nobody is accessing the mail system.
> 
>> b) UID=16 suddenly appeared on Cyrus side even though it wasn't there earlier. This isn't allowed by IMAP standard.
> 
> Hm, this seems to be a possible reason.
> So, successive numbers?
> 
> It seems to happen mostly on huuge mailboxes.

It's still strange if Cyrus is doing that. It's generally a pretty well behaving IMAP server. What version is it?