A Release Candidate build of Opera 11.50, the next version of Opera Software’s web browser, is now available to download.
Version 11.50 of the browser ships with the new ‘Featherweight’ interface tweaks, an improved Speed Dial and greater support for HTML5, CSS and other web technologies.
Ubuntu users can download a .deb installer for Opera 11.50 RC via the Opera Next page. Opera Next can be installed and used alongside a stable build of Opera.
Source | my.opera.com/desktopteam