Problem seems to be fixed in KDE 4.3 (karmic)
** Changed in: kdepim (Ubuntu)
Status: New => Fix Released
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kmail doesn't remember manually sorted folder list and accounts order
https://bugs.launchpad.net/bugs/352780
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Confirm on Kubuntu 9.04 with KDE 4.2.2 and Kmail Version 1.11.2.
Ordering of accounts and folders didn't saved and after restart application -
resets to default.
In list settings (right click on list header columns) changing "Sort Items" to
"Automatically" and back to "Manually" didn't help.
Re