Opera Web Browser Update Features Secret Security Fixes
In the security business, it’s generally the rule to publish information about security patches: what they fix, or at least the type of threat that has been mitigated. Opera has updated its web browser, and their changelog for the latest version lists several security issues, but some of their descriptions read,
Fixed an extremely severe issue; [...]
http://blog.intego.com/2010/06/23/opera-web-browser-update-features-secret-security-fixes/