Sever OS: Linux/Centos 5.9
SSLServer: Stunnel
ErrorMessage: no certificate available
CertType: SSL Web Server Certificate
Client Browser: Safari 5.1.
Client OS: OS X Lion

When i am trying to hit the URL on safari browser it shows me the messages "no certificate available" 
No certificate meet the application . However, the same link is working for all other browsers. Moreover, we have checked the stunnel logs, but couldn't able to get any thing from the logs.

Apache HTTPS config we have option SSLVerifyClient none in Stunnel I have tried all option non of thing working.

Please help me. 

Thanks
 Libin