Cannot run Rails 3.0pre

Hi, I have tried the following:

rails rails-3.0-test
cd rails-3.0-test
rake rails:freeze:edge

Next, I'm using ruby 1.9.1p243 on Mac OS 10.5.8. Now, the standard generators appear to be broken. For example,

$ script/generate scaffold post title:string body:text
/Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:45:in `require': no such file to load -- /Users/conradwt/rails.dir/examples/rails-3.0-test/config/../vendor/rails/railties/lib/initializer (LoadError)
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:45:in `load_initializer'
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:38:in `run'
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:11:in `boot!'
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:110:in `<top (required)>'
    from script/generate:2:in `require'
    from script/generate:2:in `<main>'

I also tried the above on Ruby 1.9.2dev (2009-07-18 trunk 24186):

$ script/generate scaffold post title:string body:text
/Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:45:in `require': no such file to load -- /Users/conradwt/rails.dir/examples/rails-3.0-test/config/../vendor/rails/railties/lib/initializer (LoadError)
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:45:in `load_initializer'
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:38:in `run'
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:11:in `boot!'
    from /Users/conradwt/rails.dir/examples/rails-3.0-test/config/boot.rb:110:in `<top (required)>'
    from script/generate:2:in `require'
    from script/generate:2:in `<main>'