Exposed form in block displays all records

Creating a view with an exposed date filter using AJAX works perfectly -- but switching it to "Exposed form in block" simply displays all records as if the filter were completely ignored. Submitting the exposed form when in a block refreshes the page with the additional fields applied to the URL like so:

http://www.mysite.com/?v[value][month]=5&v[value][day]=12&v[value][year]...

And instead of filtering, all records that match the content type (events) are displayed, regardless of their dates. Again, when using AJAX the same view and exposed filter works great -- but it seems that I can't use AJAX because I need to retrieve the value submitted and calling the $_SESSION variable doesn't work (see http://drupal.org/node/1151910).

Here's my exported view, if that helps:

$view = new view;
$view->name = 'today';
$view->description = 'Displays the daily events in the "Today at the Zoo" block.';
$view->tag = '';
$view->view_php = '';
$view->base_table = 'node';
$view->is_cacheable = FALSE;
$view->api_version = 2;
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */
$handler = $view->new_display('default', 'Defaults', 'default');
$handler->override_option('fields', array(
  'field_event_date_value' => array(
    'label' => '',
    'alter' => array(
      'alter_text' => 0,
      'text' => '',
      'make_link' => 0,
      'path' => '',
      'link_class' => '',
      'alt' => '',
      'prefix' => '',
      'suffix' => '',
      'target' => '',
      'help' => '',
      'trim' => 0,
      'max_length' => '',
      'word_boundary' => 1,
      'ellipsis' => 1,
      'html' => 0,
      'strip_tags' => 0,
    ),
    'empty' => '',
    'hide_empty' => 0,
    'empty_zero' => 0,
    'link_to_node' => 1,
    'label_type' => 'none',
    'format' => 'time_only',
    'multiple' => array(
      'multiple_number' => '',
      'multiple_from' => '',
      'multiple_to' => '',
      'group' => 0,
    ),
    'repeat' => array(
      'show_repeat_rule' => 'hide',
    ),
    'fromto' => array(
      'fromto' => 'value',
    ),
    'exclude' => 0,
    'id' => 'field_event_date_value',
    'table' => 'node_data_field_event_date',
    'field' => 'field_event_date_value',
    'relationship' => 'none',
  ),
  'title' => array(
    'label' => '',
    'alter' => array(
      'alter_text' => 0,
      'text' => '',
      'make_link' => 0,
      'path' => '',
      'link_class' => '',
      'alt' => '',
      'prefix' => '',
      'suffix' => '',
      'target' => '',
      'help' => '',
      'trim' => 0,
      'max_length' => '',
      'word_boundary' => 1,
      'ellipsis' => 1,
      'html' => 0,
      'strip_tags' => 0,
    ),
    'empty' => '',
    'hide_empty' => 0,
    'empty_zero' => 0,
    'link_to_node' => 1,
    'exclude' => 0,
    'id' => 'title',
    'table' => 'node',
    'field' => 'title',
    'override' => array(
      'button' => 'Override',
    ),
    'relationship' => 'none',
  ),
));
$handler->override_option('sorts', array(
  'field_event_date_value' => array(
    'order' => 'ASC',
    'delta' => '-1',
    'id' => 'field_event_date_value',
    'table' => 'node_data_field_event_date',
    'field' => 'field_event_date_value',
    'relationship' => 'none',
  ),
));
$handler->override_option('filters', array(
  'status' => array(
    'operator' => '=',
    'value' => '1',
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'id' => 'status',
    'table' => 'node',
    'field' => 'status',
    'override' => array(
      'button' => 'Override',
    ),
    'relationship' => 'none',
  ),
  'type' => array(
    'operator' => 'in',
    'value' => array(
      'event' => 'event',
    ),
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'id' => 'type',
    'table' => 'node',
    'field' => 'type',
    'override' => array(
      'button' => 'Override',
    ),
    'relationship' => 'none',
  ),
  'field_event_date_value_1' => array(
    'operator' => '=',
    'value' => array(
      'value' => NULL,
      'min' => NULL,
      'max' => NULL,
      'default_date' => 'now',
      'default_to_date' => '11:59pm today',
    ),
    'group' => '0',
    'exposed' => TRUE,
    'expose' => array(
      'use_operator' => 0,
      'operator' => 'field_event_date_value_1_op',
      'identifier' => 'v',
      'label' => '',
      'optional' => 1,
      'remember' => 1,
    ),
    'date_fields' => array(
      'node_data_field_event_date.field_event_date_value' => 'node_data_field_event_date.field_event_date_value',
    ),
    'date_method' => 'OR',
    'granularity' => 'day',
    'form_type' => 'date_select',
    'default_date' => 'now',
    'default_to_date' => '11:59pm today',
    'year_range' => '-3:+3',
    'id' => 'field_event_date_value_1',
    'table' => 'node_data_field_event_date',
    'field' => 'field_event_date_value',
    'relationship' => 'none',
  ),
));
$handler->override_option('access', array(
  'type' => 'none',
));
$handler->override_option('cache', array(
  'type' => 'none',
));
$handler->override_option('header', '<img src="/sites/all/themes/zoo/images/today_at_the_zoo.jpg" alt="Today at the Zoo">');
$handler->override_option('header_format', '2');
$handler->override_option('header_empty', 1);
$handler->override_option('footer_format', '2');
$handler->override_option('footer_empty', 0);
$handler->override_option('empty', 'Currently there are no upcoming events today but check back often!');
$handler->override_option('empty_format', '3');
$handler->override_option('items_per_page', 5);
$handler->override_option('distinct', 1);
$handler->override_option('row_options', array(
  'inline' => array(
    'field_event_date_value' => 'field_event_date_value',
    'title' => 'title',
  ),
  'separator' => '-',
  'hide_empty' => 0,
));
$handler->override_option('exposed_block', TRUE);
$handler = $view->new_display('block', 'Block', 'block_1');
$handler->override_option('block_description', '');
$handler->override_option('block_caching', -1);