title: Plone 4.1 ConfigurationError - Unknown directive 'expressiontype'
body: <p>After adding unweb.watermark to eggs, I get an endless series of starts in instance.log (Plone 4.1.2), but no service.</p>
  
  <p>See buildout / fg at <a href="http://pastie.org/2776226" rel="nofollow">http://pastie.org/2776226</a></p>
  
  <p>How can I investigate/fix this?</p>