A new development milestone of Opera 10.10 is now available for download. According to the Norway-based browser maker, Opera 10.10, a spinoff from Opera 10.0, bundled with the Opera Unite technology, has evolved all the way to the third Release Candidate. Moreover, the evolution comes at an extremely fast pace, considering the versions of the browser that Opera Software made available for early adopters following the delivery of the first RC build. In fact, Opera 10.10 RC1 is still a young release by any standards, having been made available for download at the end of last week, on November 13th, 2009.

At that time, in the context of a luck-starved Friday the 13th, Opera Software pushed for a lucky Release Candidate. However, a new variant proved necessary in order to deal with issues in which Opera unite applications no longer restarted along with the whole of Opera 10.10 RC.

“Several people have mentioned that when restarting Opera the Unite applications do not restart. We have a possible fix. So please take it for a spin and see if it caused any regressions,” revealed a member of the Opera Desktop team. On November 15th, the second Release Candidate of Opera 10.10 with Unite was offered to testers, and the fact that the team is hard at work even on a Sunday can only point to the proximity of the final release.

And just two days later, Opera Software is offering users a fresh RC Build for testing. The latest bits are labeled RC3 and are largely designed to deal with additional issues that the browser maker has identified with the version 10.10 of its Opera project.

“At the Opera HQ we are feverishly working to fix all bad issues! The new RC build fixes a few more issues with not restarting Unite properly. Also, it addresses some more Unite problems and includes performance improvements. For Linux users, there are some fixes for the systray! As usual, we appreciate any reports about regressions! Happy testing,” an Opera Desktop Team representative added.

Opera 10.10 with Opera Unite Release Candidate 3 (RC3) is available for download here.