Bug 1024540

Description of problem:
I'm using kontact with imap accounts as my mail solution. Sometimes kmail seems to forget the contents of the trash folders of my imap accounts. The mails are not removed from the server, but kmail simply doesn't show them anymore. Restarting kontact recovers the situation. After a kontact restart, the folders show the full content again.

This issue seems to be triggered as a combination of moving mails to trash (without first explicitly having looked at the trash folder) and then some time passing.

In summary:
- Trash folders I haven't moved mail into since kontact/kmail launch always show all mails in trash. It doesn't matter if I look immediatly after launch, or after some time. The mails are there.
- When I move a mail to a trash folder I haven't looked at yet since kontact/kmail launch and then after "some" time look at the trash folder, only the deleted mail is there (if not part of an earlier mail thread already in trash, in which case it's hidden as well as it is added to the hidden mail thread)

I realize "some" time is a bit vague. I don't check my trash folders that often. But occasionally I do, usually when kmail has been running a couple of hours and several mails have been moved to trash. All these mails are visible, but not the ones that were already in trash when kmail was launched.

Version-Release number of selected component (if applicable):
kdepim-4.11.2-1.fc19.x86_64

How reproducible:
Regularly. The combination of
- mails having been moved to trash
- not having looked at the trash before moving mails to trash
- sufficient time passing
seems to trigger the behaviour consistently here.

Steps to Reproduce:
1. Start kmail, with an imap account configured (server is dovecot on Centos 5)
   The trash folder should have some mails in it already when launching kmail.
2. Don't look at the Trash folder, but move another message into trash
3. Wait some time (don't know how long, but make it long enough)
4. Look at the trash folder

Actual results:
Only the mails that were moved to trash since kmail was launched are visible. The ones that were already in trash when kmail was launched are not visible. They are not deleted because restarting kmail will show them again in trash.

Expected results:
The trash folder should always show its full content.

Additional info:
There are no search filters set on the trash folders.