We just released 11.51 (b1087) with one security issue fixed and with several stability fixes.
This security update comes right after the Diginotar certificate breach, but Opera does not require a fix for this issue. Opera always verifies that certificates are not revoked, and unlike other browsers Opera does not display sites as secure if access to revocation servers has been blocked by an attacker. Read more about this issue on the
The Opera Security group - When Certificate Authorities are Hacked
See changelog here:
Opera 11.51 for Windows changelog
