Hi.
I'm running OS11.1 with Gnome, and yesterday I wanted to try Firefox 3.6, so I went to the download page, found the one-click install for it (from Mozilla repo) and installed it.
It updated a bunch of other packages, and then I started the program. It wouldn't start, giving out an error about not founding some GRE thing, or something.
So I shrudded and went to Yast and reinstalled the "official" Firefox 3.0.17 build.
Since then, each and every site that need secure connection won't load, and the error page saying

Code:
Secure Connection Failed 

www.siteaddress.com uses an invalid security certificate.

The certificate is not trusted because the issuer certificate is unknown.

(Error code: sec_error_unknown_issuer)

    * This could be a problem with the server's configuration, or it could be someone trying to impersonate the server.

    * If you have connected to this server successfully in the past, the error may be temporary, and you can try again later.

          Or you can add an exception
I tried adding the exception, but in some cases it won't even work this way, and the error keeps showing. Also, I don't think I can add exceptions to each and every secure server in the entire world...

Any suggestions about how to revert this problem?
Thanks a lot.
Luca