title: rvm, irb and require - not working for installed gems under irb
body: <p>I have just installed rvm today and it looks really handy/powerful.</p>
  
  <p>I think I am getting the hang of it, but...</p>
  
  <p>When using an rvm installed ruby, and running irb, when I require an installed gem, something, like 'rvm', I get:</p>
  
  <pre><code>&gt; kimptoc$ rvm use 1.8.7
  Using /Users/kimptoc/.rvm/gems/ruby-1.8.7-p302
  
  
  &gt; kimptoc$ gem list
  
  *** LOCAL GEMS ***
  
  abstract (1.0.0)
  ...
  rvm (1.0.11)
  ...
  
  
  &gt; kimptoc$ irb
  ruby-1.8.7-p302 &gt; require 'rvm'
  LoadError: no such file to load -- rvm
      from (irb):1:in `require'
      from (irb):1
  </code></pre>
  
  <p>But when using the "system" ruby, it works fine.</p>
  
  <p>Historically I have been using sudo gem install ... and so the "system" gems are generally installed that way. Could that be my problem?  Do I need to uninstall these to fix things?</p>
  
  <p>I am running OSX 10.6.4.  "system" is the default OSX ruby, 1.8.7 (p174)</p>
  
  <p>Thanks in advance for any tips/thoughts,
  Chris</p>