i am having a problem with running the letsencrypt certs on my server (apache 2.4.x, debian jessie)
i.e. firefox gives me the following:
Dem Zertifikat wird nicht vertraut, weil das Aussteller-Zertifikat unbekannt ist. Der Server sendet eventuell nicht die richtigen Zwischen-Zertifikate. Ein zusätzliches Stammzertifikat kann nicht importiert werden. (Fehlercode: sec_error_unknown_issuer)
no, i did not receive an invite, but to tell the truth, i just started into letsencrypt today. would it be possible that i get a chance to be in that beta program still?
In this context, I agree that the problem is due to using the client software without being in the beta program. As @bmw says, only beta program participants can get publicly-trusted certificates from the CA now. Others will still get an untrusted test certificate until the service is generally available to the public.