Changes in Opera 9.51 Build 10080 RC2:
# Security status should be now always correctly set when navigating from HTTP to HTTPS.
# Fixed an issue related to OCSP and CRLs that would lower security level - Yngve has a detailed article. You'll have to manually check for updates to activate this fix.
# Fixed an issue in the content blocker that might cause no page to be loaded anymore.
# Fixed a crash on Yahoo! Mail (now really!).
# Fixed a crash with userjs.
# Fixed a crash related to Dragonfly.
# Fixed a crash on Print Preview.
# Fixed an issue that caused unwanted line breaks in rich text editors.
# Fixed loading of stylesheets when navigating in history.