I get that all the time. The certificate belongs to real-time.com and not mn-linux.org.
Even if the certificate is not registered, you still perform an encrypted transaction.
It just means they didn't register that certificate with a Certificate Authority.

On Mon, Jul 30, 2001 at 08:42:03PM -0500, Jon Schewe wrote:
> I just tried going to the mailing list page for TCLUG with Opera and got
> "Certificate signer not found".  "The server's certificate chain is
> incomplete, and the signer(s) are not registered.  Accept?"  What's up with
> that? 
> 
> 
> -- 
> Jon Schewe | http://mtu.net/~jpschewe | jpschewe at mtu.net
> For I am convinced that neither death nor life, neither angels 
> nor demons, neither the present nor the future, nor any 
> powers, neither height nor depth, nor anything else in all 
> creation, will be able to separate us from the love of God that 
> is in Christ Jesus our Lord. - Romans 8:38-39
> 
> _______________________________________________
> tclug-list mailing list
> tclug-list at mn-linux.org
> https://mailman.mn-linux.org/mailman/listinfo/tclug-list

-- 
Thanks,

Spencer J Sinn