Cannot access https://bugzilla.mozilla.org/ - eternally trying to connect securely
Once I had this problem with https://meine.deutsche-bank.de too; now this happens reliably on https://bugzilla.mozilla.org/: Opera eternally toggles the status line between "Connecting" (Verbinde mit bugzilla.mozilla.org...) and "Establishing secure connection" (Aufbau einer verschlüsselten Verbindung...) but never loads the site. Therefore I cannot "report problems with this site" out of Opera either...
You were right: Due to a disabled option it didn't work, after enabling all it worked well.
Unfortunately, Opera obviously goes into an infinite loop if it can't find a both allowed and supported encryption standard, instead of displaying a warning.
My Opera