reverted:
--- date_validation/plugins/validator/field_validation_date_field_values_validator.inc	2012-07-06 11:42:40.000000000 +0100
+++ /dev/null	2012-07-06 11:47:03.000000000 +0100
@@ -1,106 +0,0 @@
-<?php
-/**
- * @file
- * Field validation date range validator.
- *
- */
-$plugin = array(
-  'label' => t('Date validation against another date field'),
-  'description' => t("Validates user-entered date against another separated date field. For example field_date1 is greater than field_date2."),
-  'handler' => array(
-    'class' => 'field_validation_date_field_values_validator',
-  ),
-);
-
-class field_validation_date_field_values_validator extends field_validation_validator {
-
-  /**
-   * Validate field. 
-   */
-  public function validate() {
-    $settings = $this->rule->settings;
-
-    if ($this->value != '') {
-      $flag = TRUE;
-
-      $query = new EntityFieldQuery();
-      !empty($settings['entity_type']) ? $query->entityCondition('entity_type', $settings['entity_type']) : NULL;
-      !empty($settings['bundle']) ? $query->entityCondition('bundle', $settings['bundle']) : NULL;
-      !empty($settings['field']) ? $query->fieldCondition($settings['field'], 'value', $this->value, $settings['operator']) : NULL;
-      $flag = (bool)$query->range(0, 1)->count()->execute();
-
-      $flag = !empty($settings['reverse']) ? !$flag : $flag; // reverse flag value if option is set
-      !$flag ? $this->set_error() : NULL;
-    }
-  }
-
-  /**
-   * Provide settings option
-   */
-  function settings_form(&$form, &$form_state) {
-    $default_settings = $this->get_default_settings($form, $form_state);
-
-    $entity_info = entity_get_info(); // get all entities
-    $entities = array_filter($entity_info, function($a) { return $a['fieldable']; }); // filter only fieldable
-    $entities = drupal_map_assoc(array_keys($entities)); // return only the key names
-    $form['settings']['entity_type'] = array(
-        '#title' => t('Entity type'),
-        '#description' => t("Machine name. Entity type of the property that to be matched against."),
-        '#type' => 'select',
-        '#default_value' => isset($default_settings['entity_type']) ? $default_settings['entity_type'] : '',
-        '#options' => array('' => t('Choose the entity type')) + $entities,
-        // '#attributes' => array('onchange' => 'this.form.submit();'),
-        '#attributes' => array('onchange' => 'this.form.bundle.options = 1;'),
-    );
-
-    $bundles = $entity_info['node']['bundles'];
-    $bundles = drupal_map_assoc(array_keys($bundles)); // return only the key names
-    $form['settings']['bundle'] = array(
-      '#title' => t('Bundle'),
-      '#description' => t("Machine name. Bundle of the property that to be matched against."),
-      '#type' => 'select',
-      '#default_value' => isset($default_settings['bundle']) ? $default_settings['bundle'] : '',
-      '#options' => array('' => t('Choose the bundle')) + $bundles,
-    );
-
-    $fields = field_info_fields();
-    $fields = drupal_map_assoc(array_keys($fields)); // return only the key names
-    $form['settings']['field'] = array(
-      '#title' => t('Field'),
-      '#description' => t("Name of the Field that to be matched against."),
-      '#type' => 'select',
-      '#default_value' => isset($default_settings['field']) ? $default_settings['field'] : '',
-      '#options' => array('' => t('Choose the field')) + $fields,
-    );
-
-    $operators = array(
-      '<' => t('Is less than'),
-      '<=' => t('Is less than or equal to'),
-      '=' => t('Is equal to'),
-      '!=' => t('Is not equal to'),
-      '>=' => t('Is greater than or equal to'),
-      '>' => t('Is greater than'),
-      // 'between' => t('Is between'),
-      // 'not between' => t('Is not between'),
-    );
-
-    $form['settings']['operator'] = array(
-      '#title' => t('Operator'),
-      '#description' => t("Choose the operator for the selected field."),
-      '#type' => 'select',
-      '#default_value' => isset($default_settings['operator']) ? $default_settings['operator'] : '',
-      '#options' => array('' => t('Choose the operator')) + $operators,
-    );
-
-    $form['settings']['reverse'] = array(
-      '#title' => t('Reverse'),
-      '#description' => t("If it is checked, it means must not match the field."),
-      '#type' => 'checkbox',
-      '#default_value' => isset($default_settings['reverse']) ? $default_settings['reverse'] : FALSE,
-    );
-
-    parent::settings_form($form, $form_state);
-  }
-
-}
-
only in patch2:
unchanged:
--- /dev/null
+++ b/plugins/validator/field_validation_date_field_values_validator.inc
@@ -0,0 +1,130 @@
+<?php
+/**
+ * @file
+ * Field validation date range validator.
+ *
+ */
+$plugin = array(
+  'label' => t('Date validation against another date field'),
+  'description' => t("Validates user-entered date against another separated date field. For example field_date1 is greater than field_date2."),
+  'handler' => array(
+    'class' => 'field_validation_date_field_values_validator',
+  ),
+);
+
+class field_validation_date_field_values_validator extends field_validation_validator {
+
+  /**
+   * Validate field. 
+   */
+  public function validate() {
+    $settings = $this->rule->settings;
+
+    if ($this->value != '') {
+      $flag = TRUE;
+      $wrapper = entity_metadata_wrapper($settings['entity_type'], $this->entity);
+      $matched_value = $wrapper->{$settings['field']}->value();
+      $current_value = strtotime($this->value);
+
+      switch ($settings['operator']) {
+        case '<':
+          $flag = $matched_value < $current_value;
+          break;
+
+        case '<=':
+          $flag = $matched_value <= $current_value;
+          break;
+
+        case '=':
+          $flag = $matched_value == $current_value;
+          break;
+
+        case '!=':
+          $flag = $matched_value != $current_value;
+          break;
+
+        case '>=':
+          $flag = $matched_value >= $current_value;
+          break;
+
+        case '>':
+          $flag = $matched_value > $current_value;
+          break;
+
+      }
+
+      $flag = !empty($settings['reverse']) ? !$flag : $flag; // reverse flag value if option is set
+      !$flag ? $this->set_error() : NULL;
+    }
+  }
+
+  /**
+   * Provide settings option
+   */
+  function settings_form(&$form, &$form_state) {
+    $default_settings = $this->get_default_settings($form, $form_state);
+
+    $entity_info = entity_get_info(); // get all entities
+    $entities = array_filter($entity_info, function($a) { return $a['fieldable']; }); // filter only fieldable
+    $entities = drupal_map_assoc(array_keys($entities)); // return only the key names
+    $form['settings']['entity_type'] = array(
+        '#title' => t('Entity type'),
+        '#description' => t("Machine name. Entity type of the property that to be matched against."),
+        '#type' => 'select',
+        '#default_value' => isset($default_settings['entity_type']) ? $default_settings['entity_type'] : '',
+        '#options' => array('' => t('Choose the entity type')) + $entities,
+        // '#attributes' => array('onchange' => 'this.form.submit();'),
+        '#attributes' => array('onchange' => 'this.form.bundle.options = 1;'),
+    );
+
+    $bundles = $entity_info['node']['bundles'];
+    $bundles = drupal_map_assoc(array_keys($bundles)); // return only the key names
+    $form['settings']['bundle'] = array(
+      '#title' => t('Bundle'),
+      '#description' => t("Machine name. Bundle of the property that to be matched against."),
+      '#type' => 'select',
+      '#default_value' => isset($default_settings['bundle']) ? $default_settings['bundle'] : '',
+      '#options' => array('' => t('Choose the bundle')) + $bundles,
+    );
+
+    $fields = field_info_fields();
+    $fields = drupal_map_assoc(array_keys($fields)); // return only the key names
+    $form['settings']['field'] = array(
+      '#title' => t('Field'),
+      '#description' => t("Name of the Field that to be matched against."),
+      '#type' => 'select',
+      '#default_value' => isset($default_settings['field']) ? $default_settings['field'] : '',
+      '#options' => array('' => t('Choose the field')) + $fields,
+    );
+
+    $operators = array(
+      '<' => t('Is less than'),
+      '<=' => t('Is less than or equal to'),
+      '=' => t('Is equal to'),
+      '!=' => t('Is not equal to'),
+      '>=' => t('Is greater than or equal to'),
+      '>' => t('Is greater than'),
+      // 'between' => t('Is between'),
+      // 'not between' => t('Is not between'),
+    );
+
+    $form['settings']['operator'] = array(
+      '#title' => t('Operator'),
+      '#description' => t("Choose the operator for the selected field."),
+      '#type' => 'select',
+      '#default_value' => isset($default_settings['operator']) ? $default_settings['operator'] : '',
+      '#options' => array('' => t('Choose the operator')) + $operators,
+    );
+
+    $form['settings']['reverse'] = array(
+      '#title' => t('Reverse'),
+      '#description' => t("If it is checked, it means must not match the field."),
+      '#type' => 'checkbox',
+      '#default_value' => isset($default_settings['reverse']) ? $default_settings['reverse'] : FALSE,
+    );
+
+    parent::settings_form($form, $form_state);
+  }
+
+}
+