title: The plugin does not have a valid header - Wordpress cannot add new plugins
body: <p>I have wordpress version 3.4.2</p>
  
  <p>Whenever I try to activate a plugin after installing it I get </p>
  
  <pre><code>The plugin does not have a valid header.
  </code></pre>
  
  <p>I tried removing the blank spaces between</p>
  
  <pre><code>&lt;?php
  
  
  /* plugin info
  </code></pre>
  
  <p>inside the plugin_name.php file. However, it does not resolve the issue.</p>
  
  <p>Any workaround?</p>