title: Bundler could not find compatible versions for gem, updating Rails app
body: <p>After createing a brand new rails app Following the official rails blog <a href="http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released" rel="noreferrer">post</a>, attempting to convert apps to rails 3.2.0.rc2 yields the following</p>
  <pre><code>Updated Gemfile to depend on rails ~&gt; 3.2.0.rc2
      gem 'rails', '~&gt;3.2.0.rc2'
  Updated Gemfile to depend on sass-rails ~&gt; 3.2.3
      gem 'sass-rails',   '~&gt; 3.2.3'
  
  $ bundle install
  Fetching source index for http://rubygems.org/
  Bundler could not find compatible versions for gem &quot;activesupport&quot;:
    In snapshot (Gemfile.lock):
      activesupport (3.1.1)
  
    In Gemfile:
      rails (~&gt; 3.2.0.rc2) ruby depends on
        activesupport (= 3.2.0.rc2) ruby
  
  Running `bundle update` will rebuild your snapshot from scratch, using 
  only the gems in your Gemfile, which may resolve the conflict.
  
  $bundle update
  Fetching source index for http://rubygems.org/
  Bundler could not find compatible versions for gem &quot;railties&quot;:
    In Gemfile:
      coffee-rails (~&gt; 3.1.1) ruby depends on
        railties (~&gt; 3.1.0) ruby
  
      rails (~&gt; 3.2.0.rc2) ruby depends on
        railties (3.2.0.rc2)
  </code></pre>
  <p>What exactly is the issue?</p>
  <h3>System Specs:</h3>
  <p>Mac OS 10.7.2, Xcode 4.2.1, rvm 1.10.1 using ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]</p>