On Fri, 03 Oct 2008 19:22:18 -0400, jim wrote:

Tom Francis wrote:
Here is the error message

Your certificate contains the same serial numberas another certificate
issued by the certificate authority. Please get a new certificate
containing a unique serial number.

As far as I know, I didn't have any certificates before and I ain't
got none now.

Have you tried to run Thunderbird with Your Firewall off to see what
happens?

Yes. It did not.