diff --git a/imagefield_crop.module b/imagefield_crop.module
index c40dba3..4a73601 100644
--- a/imagefield_crop.module
+++ b/imagefield_crop.module
@@ -129,13 +129,14 @@ function _imagefield_crop_widget_resolution_validate($element, &$form_state) {
 
 function _imagefield_crop_widget_enforce_ratio_validate($element, &$form_state) {
   $settings = $form_state['values']['instance']['widget']['settings'];
-  if ($settings['resolution'] && !$element['#value']) {
+  if (!empty($settings['resolution']) && (!$element['#value'])) {
     drupal_set_message(t('Output resolution is defined, but not enforced. Final images might be distroted'));
   }
 }
 
 function _imagefield_crop_widget_enforce_minimum_validate($element, &$form_state) {
   $settings = $form_state['values']['instance']['widget']['settings'];
+  $rw = $rh = 0;
   list($rw, $rh) = !empty($settings['resolution']) ? explode('x', $settings['resolution']): array(0, 0);
 
   if ($settings['enforce_minimum'] &&
@@ -225,8 +226,13 @@ function imagefield_crop_widget_process($element, &$form_state, $form) {
     $file_to_crop = _imagefield_crop_file_to_crop($element['#file']->fid);
 
     $element['cropinfo'] = _imagefield_add_cropinfo_fields($element['#file']->fid);
-    list($res_w, $res_h) = explode('x', $widget_settings['resolution']);
-    list($crop_w, $crop_h) = explode('x', $widget_settings['croparea']);
+    $res_w = $res_h = 0;
+    $crop_w = $crop_h = 0;
+
+    if (!empty($widget_settings['resolution']) && (!empty($widget_settings['croparea']))) {
+      list($res_w, $res_h) = explode('x', $widget_settings['resolution']);
+      list($crop_w, $crop_h) = explode('x', $widget_settings['croparea']);
+    }
 
     $element['preview'] = array(
       '#type' => 'markup',
@@ -312,6 +318,7 @@ function imagefield_crop_widget_preview_process($element, &$form_state, $form) {
   $parents = array_slice($element['#array_parents'], 0, -1);
   $parent = drupal_array_get_nested_value($form, $parents);
   $instance = field_widget_instance($parent, $form_state);
+  $width = $height = 0;
   if ($instance['widget']['settings']['resolution']) {
     list($width, $height) = explode('x', $instance['widget']['settings']['resolution']);
   }
@@ -353,6 +360,7 @@ function imagefield_crop_widget_value(&$element, &$input, $form_state) {
 
     // get crop and scale info
     $crop = $input['cropinfo'];
+    $scale = NULL;
     $instance = field_widget_instance($element, $form_state);
     $scale = NULL;
     if ($instance['widget']['settings']['resolution']) {