[DBMail 0000978]: List command returns folder with \Noselect when it has no such flag saved

A NOTE has been added to this issue. 
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http://www.dbmail.org/mantis/view.php?id=978 
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Reported By:                fabiangergely
Assigned To:                
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Project:                    DBMail
Issue ID:                   978
Category:                   IMAP daemon
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
target:                      
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Date Submitted:             26-Jul-12 17:18 CEST
Last Modified:              26-Jul-12 17:44 CEST
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Summary:                    List command returns folder with \Noselect when it
has no such flag saved
Description: 
If I create a specific hierarchy of folders (below), and
mailboxes_by_regex() returns matching folders in a given order (depends on
database, and the exact data), then the "target folder" will be returned
with the \Noselect flag, even though it does not have this flag saved in
the database.
This is reproducible just if I use the '%' wildcard.