How do I disable these security alerts?

Hello everyone this forum.
I am a neophyte in Opera. I'm starting to use this browser.
Could anyone help me?
When I'm using it, always appears a message of "security alert", which locks the browser.
How do I disable these alerts?
I've tried looking in the menus. But I saw no tab or button for this feature.
These alerts appear when I'm playing in CityVille.
I appreciate all the help.

PS: If you already have some post about it, sorry, for I am not fluent in English, and did not show anything related to it in the search engine of this forum.
PS2: I use windows 7 ultimate 64bit sp1

Olá a todos desse fórum.
Sou neófito em Opera. Estou começando a usar esse navegador.
Algué poderia me ajudar?
Quando estou usando-o, aparece sempre uma mensagem do alerta se segurança, que trava o navegador.
Como faço para desabilitar esses alertas?
Já tentei olhar nos menus. Mas não vi nenhuma aba ou botão referente a esse recurso.
Esses alertas aparecem quando estou jogando no cityville.
Agradeço toda ajuda.

PS: caso já tenha algum post sobre isso, desculpe, pois não sou fluente em inglês, e não apareceu nada relacionado a isso no mecanismo de busca, desse fórum.
PS2: eu uso windows 7 ultimate sp1 64bits

Do you have examples where a login is NOT required?

Also, please read http://my.opera.com/community/forums/topic.dml?id=1117632

Originally posted by cetecotrin:

PS: If you already have some post about it,

Welcome to the forums and yes, there are a few. Takethis one for example.

Hi everyone,

I have same error regarding cityville. I want to share some notes. Unless I use https on Facebook, I don't get this error. To show the error, you must switch on https feature. In Opera, I got it many many times so I couldn't play the game. I tried same page on Firefox. Then, I didn't get any error dialog or bar. Everything is fine on FF. This is my question: If the web site was not designed very well, how can FF work on that well.

Thank you...

Originally posted by greench:

This is my question: If the web site was not designed very well, how can FF work on that well.

Because FF does not (yet, at least) display a warning about that precise security policy breach (AFAIK they show one for the same action from forms, but not when done by plug-in applets).

If parts of a secure page tries to submit (not fetch) information in an unsecure fashion, then Opera will warn about it, allowing the user to evaluate the security risk of each operation.

We added this warning after we caught a Las Vegas hotel sending credit card details unencrypted in that fashion.

It is Facebook's and its game providers' responsibility to ensure that the secure page version of their site only references secure resources. Have you contacted them about the issue?