I recently heard that Internet explorer 6.0 is only compatible with the old Facebook layout.

1. That Opera is different may be due to the default browser settings, but I am not sure.
2. Did you note the difference that happened when I copied and pasted the same code from the "Opera and IE /FF" page? That is an interesting difference.
3. I know that Opera is nearly paranoid on security. Their overall security principle is:
   
   "Don't rely on any internet site."
   
   That is why I recommend Opera for the surfer. My children constantly got viruses. After installing Opera, they have not had a single known infection. I think we are too sloppy on security issues.
   
   Regarding toolbars and plugins. There are hundreds if not thousands of them for FireFox. I would be very careful with directly recomending such plugins / toolbars, even if I have links to some I personally regard as secure in my link collection. But who knows?
   
   So back to the LinkedIn plugin. It functions with default settings in IE and FF but not in Opera. Look at the source of the LinkedIn olugin:
   
   Code:

    
   The company that owns this site has one account on:<br /><br /> 
      <span id="mfit"></span>  
         <script type="text/javascript">           
          new LinkedIn.CompanyInsiderBox("mfit","MultiFinansIT");     
      </script>

   From the Opera security and privacy page.

"JavaScript

JavaScript (or actually ECMAScript) is a means of embedding executable content in Web pages. It is used for everything from making image links change when your mouse hovers over them, to receiving and sending cookies.

These scripts are completely safe most of the time, but they have been used for malicious purposes. JavaScript should not be able to access applications and information outside the Web page it resides on, but if you still fear JavaScript abuse, you can choose to disable it. You can also put some limits on what Opera should let the script do, e.g., resize or move windows, by clicking "JavaScript options". And you can choose to have the JavaScript console displayed should there be an error.
If you completely disable JavaScript, however, some sites may report errors, fail to display vital content such as menus or even shut you out. Remember that JavaScript is easily toggled on and off by way of Opera's "Quick preferences", that is displayed by pressing F12".

My bolding. That is (most probably) the reason since I have JavaScript enabled. It is regarded as a fact that cross server scripting is impossible in Opera. This may be an indication that that is true. I agree with Opera on this issue.

Aside from facts, this was no Ad for Opera. As a webmaster, I find FireFox and FireBug very useful, but will never recommend another browser than Opera for the uninformed surfer in 2008. Now I recommend my children to use OpenID. May be it takes additional 4 years before they use it (it can be misused, but is more secure than the alternative - no digital Id).

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