--- filefield_widget.inc	2010-06-16 14:54:09.000000000 -0700
+++ filefield_widget-new.inc	2010-06-22 11:29:58.458456145 -0700
@@ -15,9 +15,8 @@
 function filefield_widget_settings_form($widget) {
   $form = array();
 
-  // Convert the extensions list to be a human-friendly comma-separated list.
   $extensions = is_string($widget['file_extensions']) ? $widget['file_extensions'] : 'txt';
-  $extensions = implode(', ', explode(' ', $extensions));
+
   $form['file_extensions'] = array(
     '#type' => 'textfield',
     '#title' => t('Permitted upload file extensions'),
@@ -95,9 +94,7 @@ function filefield_widget_settings_save(
 }
 
 function _filefield_widget_settings_extensions_validate($element, &$form_state) {
-  // Remove commas from file extensions.
-  $value = str_replace(',', ' ', $element['#value']);
-  $value = array_filter(explode(' ', $value));
+  $value = array_filter(explode(' ', $element['#value']));
   $value = implode(' ', $value);
   form_set_value($element, $value, $form_state);
 }