[Dovecot] iPhone and custom imap folders problem

Hi

Im using Dovecot 1.0.10 and everything seems work ok except one client He is accessing his mailbox using iPhone There are several custom folders created and mail is directed to them using procmail The problem is iPhone mail app only sees changes in INBOX and when new mail arrives to other folders it will not see it unlers user accesses this particular folder Is there some kind of workaround for this?

Im quite sure its iPhones fault as all other email clients are workin perfectly fine.