Cannot add date filter to views; 'views_date_handler' not found

I'm testing D6.2 for a new site and have Views 6.x-2.0-beta3, Date-6.x-1.x-dev, and CCK 6.x-1.0-alpha installed. I have a view called "eventlist" which I want to display "event" nodes with an "eventstart" (CCK date field) time greater than or equal to "now," but have not been able to coax it to do so. I realize that this is a lot of dev code to throw together, which makes pinpointing the source of the problem harder.

Without the date filter, or with a blank one, I get events listed as expected. Under Filters, I am only given options to filter on field_eventstart for Year, Month, and Day, even though the field is set to provide minute-level granularity. So first I tried setting greater than or equal to now-now-now for the y-m-d, which returns zero nodes. I then tried setting an explicit date using the drop-down menus (e.g. 2008-May-01), but was not able to update; I get the red error box with the cryptic message "is invalid. is invalid. is invalid."

The dates are indeed stored correctly in our database, in the new Date module format (e.g. 2008-05-25 17:30:45 instead of the Unix timestamp). Is the problem as simple as Views 2 being built with the older Date module in mind?

 $view = new view;
$view->name = 'eventlist';
$view->description = 'List of upcoming events';
$view->tag = 'eventlist';
$view->view_php = '';
$view->base_table = 'node';
$view->is_cacheable = '0';
$view->api_version = 2;
$view->disabled = FALSE; // Edit this to true to make a default view disabled initially
$view->display = array();
  $display = new views_display;
  $display->id = 'default';
  $display->display_title = 'Defaults';
  $display->display_plugin = 'default';
  $display->position = '1';
  $display->display_options = array(
  'style_plugin' => 'list',
  'style_options' => array(
    'type' => 'ul',
  ),
  'row_plugin' => 'fields',
  'row_options' => array(),
  'relationships' => array(),
  'fields' => array(
    'field_eventstart_value' => array(
      'id' => 'field_eventstart_value',
      'table' => 'node_data_field_eventstart',
      'field' => 'field_eventstart_value',
      'label' => '',
      'format' => 'short',
      'multiple' => array(
        'group' => TRUE,
        'multiple_number' => '',
        'multiple_from' => '',
        'multiple_reversed' => FALSE,
      ),
      'relationship' => 'none',
      'link_to_node' => 0,
    ),
    'title' => array(
      'id' => 'title',
      'table' => 'node',
      'field' => 'title',
      'label' => '',
      'relationship' => 'none',
      'link_to_node' => 1,
    ),
  ),
  'sorts' => array(
    'field_eventstart_value' => array(
      'id' => 'field_eventstart_value',
      'table' => 'node_data_field_eventstart',
      'field' => 'field_eventstart_value',
      'order' => 'ASC',
      'relationship' => 'none',
    ),
  ),
  'arguments' => array(
    'name' => array(
      'id' => 'name',
      'table' => 'term_data',
      'field' => 'name',
      'default_action' => 'ignore',
      'style_plugin' => 'default_summary',
      'style_options' => array(
        'count' => TRUE,
        'override' => FALSE,
        'items_per_page' => 25,
      ),
      'wildcard' => 'all',
      'wildcard_substitution' => 'All',
      'title' => '%1 eventlist',
      'default_argument_type' => 'fixed',
      'default_argument' => '',
      'validate_type' => 'none',
      'validate_fail' => 'not found',
      'glossary' => 0,
      'limit' => '0',
      'case' => 'none',
      'path_case' => 'none',
      'transform_dash' => 1,
      'relationship' => 'none',
      'default_argument_fixed' => '',
      'default_argument_php' => '',
      'validate_argument_node_type' => array(
        'event' => 0,
        'page' => 0,
        'story' => 0,
      ),
      'validate_argument_php' => '',
      'add_table' => 0,
      'require_value' => 0,
    ),
  ),
  'filters' => array(
    'type' => array(
      'id' => 'type',
      'table' => 'node',
      'field' => 'type',
      'operator' => 'in',
      'value' => array(
        'event' => 'event',
      ),
      'group' => 0,
      'exposed' => FALSE,
      'expose' => array(
        'operator' => FALSE,
        'label' => '',
      ),
      'relationship' => 'none',
      'expose_button' => array(
        'button' => 'Expose',
      ),
    ),
    'tid' => array(
      'id' => 'tid',
      'table' => 'term_node',
      'field' => 'tid',
      'operator' => 'or',
      'value' => array(),
      'group' => 0,
      'exposed' => TRUE,
      'expose' => array(
        'operator' => 'tid_oper',
        'identifier' => 'tid',
        'label' => 'Category',
        'optional' => 1,
        'single' => 1,
        'remember' => 0,
        'reduce' => 0,
      ),
      'type' => 'select',
      'vid' => '1',
      'hierarchy' => 1,
      'relationship' => 'none',
      'expose_button' => array(
        'button' => 'Hide',
      ),
      'reduce_duplicates' => 1,
    ),
    'field_eventstart_value' => array(
      'id' => 'field_eventstart_value',
      'table' => 'node_data_field_eventstart',
      'field' => 'field_eventstart_value',
      'operator' => '>=',
      'value' => array(
        'valueyear' => 'now',
        'valuemonth' => 'now',
        'valueday' => 'now',
        'minyear' => '',
        'minmonth' => '',
        'minday' => '',
        'maxyear' => '',
        'maxmonth' => '',
        'maxday' => '',
      ),
      'group' => 0,
      'exposed' => FALSE,
      'expose' => array(
        'operator' => FALSE,
        'label' => '',
      ),
      'granularity' => 'day',
      'adjustment_field' => 0,
      'relationship' => 'none',
      'expose_button' => array(
        'button' => 'Expose',
      ),
    ),
  ),
  'items_per_page' => 10,
  'distinct' => 1,
  'use_pager' => '1',
  'pager_element' => 0,
  'title' => 'Upcoming eventlist',
  'use_ajax' => '1',
);
$view->display['default'] = $display;
  $display = new views_display;
  $display->id = 'page';
  $display->display_title = 'Page';
  $display->display_plugin = 'page';
  $display->position = '2';
  $display->display_options = array(
  'defaults' => array(
    'access' => TRUE,
    'title' => TRUE,
    'header' => TRUE,
    'header_format' => TRUE,
    'header_empty' => TRUE,
    'footer' => TRUE,
    'footer_format' => TRUE,
    'footer_empty' => TRUE,
    'empty' => TRUE,
    'empty_format' => TRUE,
    'use_ajax' => TRUE,
    'items_per_page' => TRUE,
    'offset' => TRUE,
    'use_pager' => TRUE,
    'pager_element' => TRUE,
    'use_more' => TRUE,
    'distinct' => TRUE,
    'link_display' => TRUE,
    'style_plugin' => TRUE,
    'style_options' => TRUE,
    'row_plugin' => TRUE,
    'row_options' => TRUE,
    'relationships' => TRUE,
    'fields' => TRUE,
    'sorts' => TRUE,
    'arguments' => TRUE,
    'filters' => TRUE,
  ),
  'relationships' => array(),
  'fields' => array(),
  'sorts' => array(),
  'arguments' => array(),
  'filters' => array(),
  'path' => 'eventlist',
  'menu' => array(
    'type' => 'tab',
    'title' => 'eventlist',
    'weight' => '0',
  ),
);
$view->display['page'] = $display;
  $display = new views_display;
  $display->id = 'block';
  $display->display_title = 'Block';
  $display->display_plugin = 'block';
  $display->position = '3';
  $display->display_options = array(
  'defaults' => array(
    'access' => TRUE,
    'title' => TRUE,
    'header' => TRUE,
    'header_format' => TRUE,
    'header_empty' => TRUE,
    'footer' => TRUE,
    'footer_format' => TRUE,
    'footer_empty' => TRUE,
    'empty' => TRUE,
    'empty_format' => TRUE,
    'use_ajax' => TRUE,
    'items_per_page' => TRUE,
    'offset' => TRUE,
    'use_pager' => TRUE,
    'pager_element' => TRUE,
    'use_more' => TRUE,
    'distinct' => TRUE,
    'link_display' => TRUE,
    'style_plugin' => TRUE,
    'style_options' => TRUE,
    'row_plugin' => TRUE,
    'row_options' => TRUE,
    'relationships' => TRUE,
    'fields' => TRUE,
    'sorts' => TRUE,
    'arguments' => TRUE,
    'filters' => TRUE,
  ),
  'relationships' => array(),
  'fields' => array(),
  'sorts' => array(),
  'arguments' => array(),
  'filters' => array(),
);
$view->display['block'] = $display;