title: vim-r tmux scrolling not working properly
body: <p>A few months ago I set up the combination of <code>Vim-R-plugin+tmux</code> on my macbook air as well as scrolling (using <code>MouseTerm</code> inside <code>SIMBL</code>). All this works perfectly fine; In particular, the scrolling works well both in the vim editor and in the adjacent R session.</p>
  
  <p>I am now trying to get the same setup on my macbook pro, but the scrolling seems to work only partially:</p>
  
  <ul>
  <li>It woks in the vim editor, but not inside the R session.</li>
  <li>The only 'scrolling' that works inside the R session is by typing <code>leader+[</code> followed by the up arrow key which is all very tedious as the cursor goes up one row at the time (note: scrolling with the mouse doesn't work at all)</li>
  </ul>
  
  <p>I am using the same .Rprofile, .vimrc and .tmux.comf on both machines. I am puzzled as to where the difference is coming from.  </p>
  
  <p>Any idea what could be causing this? </p>