title: Updated to OSX 10.9, now getting ruby error using homebrew
body: <p>Updated to Mavericks and updated Xcode.  Now I am getting this error when trying to use brew.</p>
  
  <pre><code>  $ brew cleanup
  /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require': /usr/local/Library/Homebrew/extend/pathname.rb:259: invalid multibyte escape: /^\037\213/ (SyntaxError)
  invalid multibyte escape: /^\037\235/
  invalid multibyte escape: /^\xFD7zXZ\x00/
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
          from /usr/local/Library/Homebrew/global.rb:1:in `&lt;top (required)&gt;'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
          from /usr/local/bin/brew:10:in `&lt;main&gt;'
  </code></pre>
  
  <p>Any Ideas?</p>