We've found a few more sites where this tool blocks Opera-users but I can't imagine any site that has content I would WANT to see being this clueless so I won't patch them or anything. However, while researching this I found evidence that this software is used by phishers. That makes a lot of sense when you think about it: phishing sites do not care about Google findability and they may even try to obscure themselves from security software.. So, this adds a touch of extra security for our users! Certain phishing sites actively detect Opera and automatically show a clean white page instead of their spoofed login forms. A case of security through stupidity!