Opera 11.50 "Swordfish" brings an improved user interface (new toolbar icon set, updated statusbar design, removed borders in the address bar, home and fast forward buttons are now optional, new tab fold attention state), password synchronization, improved Opera Mail and Speed Dial as well as better support for CSS3 and HTML5.
The new version also brings a new Presto rendering engine: 2.9 which makes Opera even faster than before (up to 20% faster rendering of CSS and SVG - according to the Opera devs).
For a complete changelog, see THIS page.
