Unread mails in kmail2

Hello, I am using kdepim 4.4.93 for Fedora 13, 64bit. I am seeing all my messages counted as unread in the folder list, while being marked as read in the message list. Is there any way to reset the index, like in the old days, do I have to reconfigure akonadi, or should i file a bug? I am using kmail with the akonadi imap resource and a cyrus imap server. Thanks, Christoph