Connection is untrusted puzzle

[Jim Byrnes]

On 01/06/2013 10:31 AM, Jim Byrnes wrote:
> I just tried to access a financial site on 12.04 using Firefox 17.0.1 -
> Canonical - 1.0 and was told the connection was untrusted because:
>
> not-its-real-name.com uses an invalid security certificate.
>
> The certificate is not trusted because no issuer chain was provided.
>
> (Error code: sec_error_unknown_issuer)
>
>
> On the same desktop machine running 10.04 using Firefox 17.0.1 -
> manually installed I get no warning and can connect as usual.
>
> On my laptop running 12.04 - Firefox 17.0.1 - Canonical - 1.0 I get no
> warning and can connect as usual.
>
> I have compared the Security and Encryption settings between the 3
> machines and see no differences.  The certificate is from GeoTrust if
> that makes a difference.
>
> Anyone have any ideas where to look to fix this?
>
> Thanks,  Jim
>
>

I forgot to mention that I can connect to other https sites from the 
system showing the problem.