Thunderbird tags with dovecot imap

If Thunderbird tags (important, todo etc) are lost, when using thunderbird + imap + dovecot server:

In dovecot.conf, uncomment and change to msgbox_lazy_write=no :

#mbox_lazy_writes=yes

to

mbox_lazy_writes=no

Ref: http://www.dovecot.org/list/dovecot/2009-March/037855.html

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