[Bug 603402]

[Philippe Cloutier]

I have had 2 Thunderbird 45 instances for the same Gmail account open in
the last weeks, viewing the All Mail folder while I was deleting mails
from that folder. On several occasions, I noticed after deleting and/or
tagging mails from one instance that the other instance wasn't updated.
The deleted mails would still show, and would keep showing even after
"Get Messages". There was no activity shown, and even Activity Manager
showed nothing going on. If I remember correctly, this fixed between 1
and 5 minutes after going back to the outdated instance (Thunderbird
would take the initiative to update, even though it had been asked
before).

It seems like after a while Thunderbird goes in some kind of sleep mode,
and has trouble waking up from that, but it hasn't happened often enough
for me to explain the precise conditions needed for this to happen.

I do not fully understand Summary and am unable to parse several
comments, and as it would take an eternity to go through all other
comments, I will assume that the symptoms I experienced are results of
the bug reported here and add a vote.

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https://bugs.launchpad.net/bugs/603402

Title:
  Thunderbird incorrectly shows some Gmail archived messages as unread
  via IMAP

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