[Dovecot] imap idle and concurrent connections

Hi,

in my testing dovecot (1.2 in that case) seems to not notify all idling clients about new "recent" mails but only one of them. The others get usually a message about the new number of mails after some time but never recent ones. Only one client gets notified about a new mail. Is that a known issue or something which might be configuration specific?

Wolfgang