Turbo mode skipping emails it shouldn't skip

[aaptel]

I have some folders on my IMAP servers where imap2maildir tubo mode is eager to turbo new emails. It is very annoying. I have to do non-turbo mode on those, and it takes a long time to run.

$ imap2maildir -c imap2md.conf -v --create -d archive/main -r INBOX/main -s ALL
Opening sqlite3 database 'archive/main/.imap2maildir.sqlite'
Synchronizing 833 messages from gwmail.emea.novell.com:INBOX/main to /home/aaptel/mails/archive/main...
TURBO MODE ENGAGED!
Populating hash cache...
Hash cache: 2224 hashes
Populating uid cache...
Uid cache: 1405 uids
FINISHED: Turboed 833, handled 0, copied 0 (0 bytes), last UID was 0

I've added a few print statements here and there (simpleimap.py Summaries)

def Summaries(self, search='ALL'):
    """ Summaries
    """

    if self.__turbo:
        self.__parent.select(self.__folder, readonly=True)
        for u in self.Uids(search=search):
            if not self.__turbo(u):
                print(' not TURBO u= '+repr(u))
                try:
                    summ = self.__parent.get_summary_by_uid(u)
                    if summ:
                        yield summ
                except Exception:
                    logging.exception("Couldn't retrieve uid %s", u)
                    continue
            else:
                print('     TURBO u= '+repr(u)) ### print 833 times here
                # long hangtimes can suck
                self.__keepaliver()
                self.__turbocounter += 1
    else:
        for s in self.__parent.get_summaries_by_folder(self.__folder, self.__charset, search):
            yield s

And in imap2maildir check_message()

elif uid:
    print("u=%s uid"%uid) ### prints 833 times here
    if str(uid) in seencache.uids:
        mailfile = seencache.uids[str(uid)]
    else:
        c.execute('select mailfile from seenmessages where uid=?', (uid,))
        row = c.fetchone()
        if row:
            log.debug("Cache miss on uid %s" % uid)
            mailfile = row[0]
        else:
            return False

I'm not sure what is happening but it is super annoying >:(

[aaptel]

Forgot to say, exactly one new email should have been fetched here.

[aaptel]

the new email UID is checked in both turbo and non-turbo, but only fetched in non-turbo.