In version 6, the imap server has changed. The dovecot imap server is now being used. When doing an upgrade, the folders get migrated automatically. However, since you just did a restore after a clean install, you will need to do this migration manually. Login as root and give the command:
/etc/e-smith/events/actions/imap-relocate-maildirs
That should migrate your folders for all users. Not sure about your procmail issue.
HTH, make sure you have a backup first,
André
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