[Bug 278737] New: mails marked as read show unread upon next folder refresh

[JHF2442]

https://bugs.kde.org/show_bug.cgi?id=278737

           Summary: mails marked as read show unread upon next folder
                    refresh
           Product: kmail2
           Version: 2.1.1
          Platform: Archlinux Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: folders
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: j-kde_bts at joel-hatsch.net


Version:           2.1.1 (using KDE 4.6.5) 
OS:                Linux

messages from old maildirs are marked as unread - why ? good question.

marking the messages as read, they appear anew unread upon "Update folder"
command.

However, not all emails in the folder are marked as unread, and it's not
affecting all folders (but many)

Reproducible: Sometimes

Steps to Reproduce:
- "update folder" command
- mark all emails as read (no matter how)
- no unread emails
- "update folder" command


Actual Results:  
emails are already unread

Expected Results:  
emails remain read

maildir folders come from kmail1.x

good news : removing the .folder_name.index file (replace folder_name with name
of the folder) seems to solve the issue - is this OK or does it involve
collateral damage ?

possibly a dupe of #276856, but I don't see the issue in my inbox, rather in my
"historic" folders, so maybe a different root cause

-- 
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.