Opera 10.10 development build now available for download comes with the much talked about Opera Unite -- a web server in the web browser. Opera 10.10 builds are a continuation of Opera 10 plus Unite with bug fixes.
Better stay with Opera 10 if you prefer a stable well functioning browser to a complex, unstable Opera 10.10 development build with many unknowns and full of bugs.
The changelog is full of bug fixes to Opera User Interface (reduced memory usage and startup time of Opera’s history), Opera Mail and Chat, BitTorrent, Opera Unite and more fixes for the Mac, Windows and Linux platforms.
Opera 10.10 is a free download for Windows, Macintosh and Linux platforms.