Opera 11.50 final "Swordfish" has been released, continuing Opera "Featherweight"'s work (redesigned UI).
This stable release brings numerous bug fixes, improved layout handling for Speed Dial, mail-related optimizations (improved Gmail IMAP support, etc), security and stability enhancements, as well as a "visible" boost in speed.
How do we install Opera 11.50 final/stable?
Download it from here and install the .deb package via Ubuntu Software Center.
Is Opera web-browser still popular?
Take a look at the bellow picture (couple of hours later after the official launch)