If you get the following message, usually in firefox, and most likely just after you have installed a new SSL.

The OCSP server has no status for the certificate.

(Error code: sec_error_ocsp_unknown_cert)

It is caused by a new service offered by the SSL companies and only supported by some browsers (firefox for one). It is a revocation service which the browser uses to check to see if a SSL certificate has been revoked. The reason why you get this after installing a new certificate is that the new certificate details need to be synced up with this service.

Some companies sync their data quicker than others.

In Firefox

This feature can be turned of in (options/advanced/cetificates/certificate validation)

Links
StartCom • View topic - Certificate OCSP Validation Failiure in Firefox - forum thread on startssl.com
How to resolve the ''The OCSP server has no status for the certificate'' error? - a work around