Version:           1.5.0 (using KDE 4.6.0) 
OS:                Linux

Not 100% sure if this is an Akonadi or a kio-ssl issue...

I've configured kmail to use an SSL IMAP server with a bad certificate.
Akonadi (correctly) showed a dialog saying

The server failed the authenticity check (mail.XXXXX.ch). The certificate does not apply to the given host. The certificate is not signed by any trusted certificate authority.

(Both are expected, the server was running an out-of-the-box dovecot installation including its sample "imap.example.com" certificate).

I told Akonadi to accept it by clicking "Continue", and in the dialog that followed ("Would you like to accept this certificate forever without being prompted?"), "Forever".

However, the "The server failed the authenticity check (mail.XXXXX.ch)." dialog keeps popping up occasionally (even when kmail isn't running).

Reproducible: Always

Steps to Reproduce:
1. Set up an IMAP server with a bad SSL certificate
2. Connect to it with kmail
3. Confirm you want to accept the invalid certificate forever
4. Wait

Actual Results:  
Keeps prompting about the certificate several times a day

Expected Results:  
Warnings about the certificate go away

I know I should fix the certificate on the imap server instead ;)