On Friday 15 Feb 2013 08:33:04 v_2e@ukr.net wrote:
>   Hello!
>   I am trying to access bugs.gentoo.org using www-client/midori-0.4.8
> and here is what I get:
> 
>     bugs.gentoo.org/
>     Error granting trust: Couldn't find a place to store the pinned
> certificate
>     pkcs11:library-manufacturer=GNOME%20Keyring
> 
> I get the same message also for my own web-site which uses HTTPS
> protocol.
>   Could somebody please give me a hint on how to resolve this issue?

Read the section on "Certificate Handling" here:

  http://wiki.xfce.org/midori/faq

I don't use Gnome to be able to check, but it seems that gnome-keyring 
(assuming it's running) has not registered itself with your environment.

-- 
Regards,
Mick