title: jquery autocomplete this.source is not a function error
body: <p>I've implemented autocomplete on an input field, but the box does not show up and firebug returns "this.source is not a function". I've used autocomplete on other fields of the same page without any problems. (two textarea's).</p>
  
  <p>I'm using the following code to debug, same effect if I run from script file or Firebug command line.</p>
  
  <pre><code>var fakedata = ['test1','test2','test3','test4','ietsanders'];
  $("#omschrijving").autocomplete(fakedata);
  </code></pre>
  
  <p>running jquery 1.4.2 and jquery ui 1.8.2, both minified versions.</p>
  
  <p>Does anyone have an idea how autocomplete works fine on the textareas but causes this malfunctioning on inputs?</p>
  
  <p>Error &amp; Stack trace:</p>
  
  <pre><code>this.source is not a function
  http://facturatie.autodealers.nl/dev/resources/js/jquery-ui-1.8.2.custom.min.js
  Line 570
  close(Object { name="a"})jquery....min.js (regel 570)
  close(Object { name="a"}, Object { name="c"})jquery....min.js (regel 570)
  response()
  </code></pre>