Description of problem: When using Maildir, message labels in Mozilla are applied cumulatively and alphabetically, breaking a mail client's ability to change labels. Version-Release number of selected component (if applicable): dovecot-0.99.10.4-1 and Mozilla 1.6 How reproducible: Always Steps to Reproduce: 1. Setup Dovecot using Maildir 2. Place a message within a folder. 2. Take a message and add a label, i.e. 5 (Later in Mozilla) 3. Change it to a lower label, i.e. 3 (Personal in Mozilla) 4. Now attempt to change label back to 5, or attempt to remove label. Actual results: Label flags are added cumulatively and alphabetically to the end of the maildir file instead of being removed and/or replaced. Step 2 works fine. Step 3 works fine. However, in step 4, the previous "lower" label applies, regardless of whether you attempt to remove or replace with a higher label. Applying all labels regardless of order results "abcdf" at the end of the maildir message filename. Expected results: Previous label removed and if applicable, new label applied. Additional info: Test with Mozilla 1.6 Linux or Windows, or Thunderbird 0.4 or a Thunderbird nightly Windows or Linux. Reproducable on Dovecot 0.99.10.4-1 and 0.99.10-6 under Red Hat 9 or Fedora. Evolution seems to be able to reset flags, only upon exit. Not sure if this is a Mozilla Mail or a Dovecot problem. Problem didn't seem to exist when using mbox format, only after transition to Maildir.
This sounds like a mozilla bug (evolution only commits flag changes when you expunge a folder or close it, eg on exit or when going offline).
Sounds like an upstream bug to me.
Since this bugzilla report was filed, there have been several major updates, which may have resolved this issue. Users who have experienced this problem are encouraged to upgrade their system to the latest version available. Therefore closing this bug as obsolete. If you experience this problem on the up-to-date system, please reopen this bug with an additional information.