title: Custom colorscheme not working on VIM
body: <p>Here's what I did:</p>
  
  <p><code>cp ~/.vim/colors/ir_black.vim /usr/share/vim/vim72/colors/</code></p>
  
  <p>Then tried to open some code and <code>:colorscheme ir_black</code></p>
  
  <p>It changes a few colors but makes most of the text start to blink with the cursor.
  It happens with almost all the other custom colorschemes as well. Does anyone have any ideas of what might be wrong?</p>
  
  <p>I added <code>t_Co=256</code> to my .vimrc file and it didn't seem to help.</p>
  
  <p><strong>PS:</strong> I'm on a Mac OS X.</p>