HadNav - the closed beta testing worked fine - we picked up a lot of bugs, and suggested improvements, many of which were acted on.
If you want a stable, relatively bug-free system, don't bother with beta versions - they are, by their very nature, designed to find problems and stimulate ideas. I wouldn't even contemplate trying the Windows 7 beta, but I'm happy to play with the RadarBox Beta because I love the system and care about its future.
Anyone who downloads a beta version of any software should tolerate problems, and deal with them constructively, and not criticise the developers when problems occur. Beta users are there to help, essentially becoming part of the development team.
If you had had to pay for the beta version, I would understand you grumbling about it. But even the final version will be a free upgrade - try getting the same deal from Microsoft! It's fine that you have decided to go back to version 2, but I hope that all the beta users will, as is generally the case so far, be constructive in our attempts to improve what is already a great system.
Just my opinion :-)
Rod