Opera 12 beta
Opera 12 beta has been released today.
Check out the new features in Opera 12 beta
Thanks everyone for testing and reporting issues. The upcoming weeks Opera 12 development will focus on stabilization and fixing of regressions. Stay tuned for new snapshots with loads of bugfixes.
If you have hardware acceleration turned on and are experiencing rendering or stability issues, consider turning it off (the default).
Source: Opera Desktop Team blog
More information and download: Opera 12 beta website