diff -up /Users/alex/Desktop/filefield/filefield.js ./filefield.js
--- /Users/alex/Desktop/filefield/filefield.js	2010-04-23 22:47:49.000000000 -0400
+++ ./filefield.js	2010-11-12 23:28:26.000000000 -0500
@@ -4,19 +4,18 @@
  * Auto-attach standard client side file input validation.
  */
 Drupal.behaviors.filefieldValidateAutoAttach = function(context) {
-  $("input[type='file'][accept]", context).change( function() {
+  $("input[type='file']", context).change( function() {
     // Remove any previous errors.
     $('.file-upload-js-error').remove();
 
     /**
      * Add client side validation for the input[type=file] accept attribute.
      */
-    var accept = this.accept.replace(/,\s*/g, '|');
+    var accept = Drupal.settings[this.id+'-filefield-accepted'];
     if (accept.length > 1 && this.value.length > 0) {
-      var v = new RegExp('\\.(' + accept + ')$', 'gi');
-      if (!v.test(this.value)) {
+      if (accept.indexOf(this.value) != -1) {
         var error = Drupal.t("The selected file %filename cannot be uploaded. Only files with the following extensions are allowed: %extensions.",
-          { '%filename' : this.value, '%extensions' : accept.replace(/\|/g, ', ') }
+          { '%filename' : this.value, '%extensions' : accept.join(', ') }
         );
         // What do I prepend this to?
         $(this).before('<div class="messages error file-upload-js-error">' + error + '</div>');
Common subdirectories: /Users/alex/Desktop/filefield/filefield_meta and ./filefield_meta
diff -up /Users/alex/Desktop/filefield/filefield_widget.inc ./filefield_widget.inc
--- /Users/alex/Desktop/filefield/filefield_widget.inc	2010-06-29 17:38:10.000000000 -0400
+++ ./filefield_widget.inc	2010-11-12 23:26:28.000000000 -0500
@@ -265,6 +265,8 @@ function filefield_widget_value($element
 function filefield_widget_process($element, $edit, &$form_state, $form) {
   // The widget is being presented, so apply the JavaScript.
   drupal_add_js(drupal_get_path('module', 'filefield') .'/filefield.js');
+  $settings_js = array($element['#id'] . '-upload-filefield-accepted' => explode(' ', $element['#upload_validators']['filefield_validate_extensions'][0]));
+  drupal_add_js($settings_js, 'setting');
 
   $item = $element['#value'];
   $field_name = $element['#field_name'];
@@ -423,9 +425,6 @@ function filefield_widget_process($eleme
     '#type' => 'file',
     '#description' => implode('<br />', $desc),
     '#size' => 22,
-    '#attributes' => array(
-      'accept' => implode(',', array_filter(explode(' ', $field['widget']['file_extensions']))),
-    ),
     '#access' => empty($item['fid']),
   );
 
Common subdirectories: /Users/alex/Desktop/filefield/icons and ./icons
Common subdirectories: /Users/alex/Desktop/filefield/tests and ./tests
Common subdirectories: /Users/alex/Desktop/filefield/translations and ./translations
Common subdirectories: /Users/alex/Desktop/filefield/views and ./views