title: Compass compile wrong with Unicode character
body: <p>Compass compiled everything well if I didn't put a <code>@charset "UTF-8";</code> in my root scss, its output like this:</p>
  
  <pre><code>@charset "IBM437";
  </code></pre>
  
  <p>my css output still keeps the right Unicode character, just like this:</p>
  
  <pre><code>content: "ĐĂNG";
  content: "TRẢ LỜI";
  </code></pre>
  
  <p>Its css still work with Chrome and Firefox but fail in IE because it didn't render the Unicode character and the output will completely be wrong if I put <code>@charset "UTF-8";</code> </p>
  
  <pre><code>content: "─É─éNG";
  content: "TRß║ó Lß╗£I";
  </code></pre>
  
  <p>At this time, with just two properties use Unicode characters, I can still modify it but if I have more Unicode characters, it would be a nightmare.
  Do I need to modify config.rb?</p>