title: installing ruby and rails on OSX, after installing Ruby and Rubygems the "gem install rails" command doesn't work
body: <p>im installing ruby on rails and i have ruby 1.9.2 installed as well as rubygems. im using rvm for ruby installation. anyways, when trying to install rails by typing "sudo gem install rails" I get:</p>
  
  <p>"Successfully installed rails-3.2.3 1 gem installed Installing ri documentation for rails-3.2.3... Installing RDoc documentation for rails-3.2.3..."</p>
  
  <p>but typing in "rails -v" gets:</p>
  
  <p>"Rails is not currently installed on this system. To get the latest version, simply type:
  $ sudo gem install rails
  You can then rerun your "rails" command"</p>
  
  <p>what can I do?  everything else is up to date and working.  thanks for any help.</p>