title: Vim UTF-8 encoding error on Windows
body: <p>I have a text file with Polish characters. As long as I do not set <code>:set encoding=utf-8</code> the characters are not displayed correctly. As soon as I set it to Unicode the characters are displayed but umlauts in error messages in Vim on the other hand are not displayed anymore.</p>
  
  <p>Example:</p>
  
  <pre><code>E37: Kein Schreibvorgang seit der letzten &lt;c4&gt;nderung (erzwinge mit !)
  </code></pre>
  
  <p>Instead of the <code>&lt;c4&gt;</code> there should be the character <code>Ä</code> displayed. Can anybody explain me why this happens?</p>