title: tmux "Socket is not connected" error on OS X Lion
body: <p>I get the following error when I start a new session in tmux:</p>
  
  <pre><code>launch_msg("SetUserEnvironment"): Socket is not connected                                                                                                                         
  launch_msg("SetUserEnvironment"): Socket is not connected
  </code></pre>
  
  <p>My info:</p>
  
  <ul>
  <li>OS X 1.0.7.3</li>
  <li>zsh 4.3.11</li>
  <li>tmux 1.6</li>
  </ul>
  
  <p>Tmux still launches and I haven't had any huge issues, but I'm hoping to get some insight into why this occurs. I've heard installing <a href="https://github.com/ChrisJohnsen/tmux-MacOSX-pasteboard">tmux-MacOSX-pasteboard</a> "fixes" this message, but I'd rather not install a wrapper if I don't need it's features.</p>