title: How to fix VIM system clipboard usage in Mountain Lion
body: <p><code>set clipboard+=unnamed</code> is one of my favorite <em>.vimrc</em> configs. Thanks to it, yanks and deletes are copied to my system clipboard and I can easily paste them to other applications.</p>
  
  <p>However, when I upgraded to Mountain Lion, this setting broke down. </p>
  
  <p>Do you know how to fix this problem?</p>