The bad news is some of the major fixes in Beta 2 broke some of the administration and installation process I hadn't noticed because it mostly affected new installations.
The great news is that I spent time today cleaning up the administration pages and fixing a few little annoying bugs, so you should now have a much more enjoyable installation.
http://moodle.com/download/moodle-1.0-b3.tgz
http://moodle.com/download/moodle-1.0-b3.zip