We have to praise the Vole as it has fast server but this has to be at least six DVDs that we burned to follow up this Beta story. We tried Beta 1, 2, a few non-public betas and two RC1 versions. And it all worked, more or less, on our test rig except for the latest one.
Build 5728 didn't want to work and after a few hours of upgrading from my existing RC1 build 5600 I just kept seeing the good old BSOD - Blue Screen of Death.
The Vole advised us to uninstall this build so we did. And eventually we managed to boot our Vista RC1 5600 without any issues.
To summarise the latest build, build 5728 didn't work. If you still want to burn some time and DVDs, be my guest and do it. And, if you don't mind, please drop me a line and let me know what was your experience with it. If you don't want to experiment and want a working Vista, I advise you to get the Vista RC1 5600.
Update While many readers have confirmed the problems with the upgrade, many have also written to say the installation works just fine.
Here is the story in pictures. ?