title: Rails 3.0.0.beta Install problem: can't find executable rails
body: <p>I'm trying to install the rails 3.0.0.beta and I'm running into this issue:</p>
  
  <pre><code>justins-mac-: justinz$ ruby -v
  ruby 1.8.7 (2008-08-11 patchlevel 72) [universal-darwin10.0]
  justins-mac-justinz$ rails -help
  /Library/Ruby/Site/1.8/rubygems.rb:384:in `bin_path': can't find executable rails for rails-3.0.0.beta (Gem::Exception)
   from /usr/bin/rails:19
  justins-mac-justinz$ rails -v
  /Library/Ruby/Site/1.8/rubygems.rb:384:in `bin_path': can't find executable rails for rails-3.0.0.beta (Gem::Exception)
   from /usr/bin/rails:19
  justins-mac-justinz$ 
  </code></pre>
  
  <p>Any clues as to what is going on here?</p>