Signature Certificate Invalid

I have registered a number of users and they have all been setup fine on the client side.

When I setup a user now I get the following error on the server:-

Error processing certificate created by /Domain for John Doe/Domain: The signature on the certificate was found to be invalid. Check the log file for details.

And with the client I get:-

Server error: The signature on the certificate was found to be invalid. Check the log for details.

Any ideas?

Subject: Signature Certificate Invalid

We are having the same problem… Can anyone help us?

Thanks

Subject: RE: Signature Certificate Invalid

I had same problem while renaming a person, and I noticed I had twice the same certifier in the ‘Certificates’ view on my public address book. Deleting the bad one, solved the problem.