Opera 10.00 Beta 2 Build 1679

...Amongst other things, changes to the tab thumbnail feature, you can now place tab thumbnails on the sides as well.

Opera Unite has also undergone some changes, optimizations of the Unite infrastructure and replacement of the "unite://" protocol with "http://admin." being the highlights.
Note that due to changes in Opera Unite, the new Unite infrastructure will not work with older builds.

Highlights:

* Tab thumbnails can now be placed on the sides
* Optimizations to the Unite infrastructure
* Replacing the "unite://" protocol with "http://admin."
* The Unite button on the status bar now shows available Unite users on the local network

read more + Changelog: http://my.opera.com/desktopteam/blog/2009/07/31/tab-thumbnails-on-the-sides-and-opera-unite-improvements
User Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; de) Opera 10.00

• Windows MSI / Windows Classic
  
• Macintosh (Intel-only) / Macintosh (Universal)
  
• UNIX/Linux