title: Pylons/Routes Did url_for() change within templates?
body: <p>I'm getting an error:</p>
  
  <pre><code>GenerationException: url_for could not generate URL. Called with args: () {}
  </code></pre>
  
  <p>from this line of a mako template:</p>
  
  <pre><code>&lt;p&gt;Your url is ${h.url_for()}&lt;/p&gt;
  </code></pre>
  
  <p>Over in my helpers.py, I do have:</p>
  
  <pre><code>from routes import url_for
  </code></pre>
  
  <p>Looking at the Routes-1.12.1-py2.6.egg/routes/util.py, I seem to go
  wrong about line it calls _screenargs().   </p>
  
  <p>This is simple functionality from the Pylons book.  What silly thing am I doing wrong?  Was there a new url_current()?  Where?</p>