title: What Does ActiveRecord::MultiparameterAssignmentErrors Mean?
body: <p>I have a rails form with a datetime_select field. When I try to submit the form, I get the following exception:</p>
  
  <pre><code>ActiveRecord::MultiparameterAssignmentErrors in WidgetsController#update 
  1 error(s) on assignment of multiparameter attributes
  </code></pre>
  
  <p>If it's a validation error, why don't I see an error on the page?</p>
  
  <p>This is in Rails 2.0.2</p>