[Dovecot] dovecot(last day cvs version) lost mail

i find a problem, after upgrade dovecot to last day cvs version, each folder only can see the first one arrived new mail, other new mail is lost

i see this message in mail log:

Fixed index file mail/username/.foldername/dovecot.index: first_recent_uid_lowwater 146 -> 145 Corrupted index file mail/username/.foldername/dovecot.index: Duplicate header extension keywords

openbsd/i386, postfix-2.3x, dovecot(last day cvs version)