@leocg: I just disabled all extensions. O worked fine with B of A. I then enabled a few extensions at a time and O worked find. I then enabled all extensions and O worked fine. Strange. Maybe just toggling the extensions fixed the issue!?

Thanks for the suggestion.

Also though, some sites tell the browser not to save the login info. We would need the link to the site's login form to check.

How does it relates to synchronization? By the way, you can already password protect your synced data.

To avoid people having access to Opera and any other software or data in your computer, just use a password to login into your OS and add users for others to use it when needed.