@rainisto
Check post #2 - it is not finding and installing via GUI the certificate that brings issues. It is that after that this certificate is not used by browser. I can see the certificate package being present in the system by selecting Show>User certificates.
I have trouble with default browser on many web-sites that require secure connection, e.g forum.meego.com.

EDIT: I made mistake - in PR1.2 forum.meego.com can be logged in. My apologies.