Index: filefield.js
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/filefield/filefield.js,v
retrieving revision 1.27
diff -u -r1.27 filefield.js
--- filefield.js	8 Dec 2010 15:04:20 -0000	1.27
+++ filefield.js	8 Dec 2010 21:02:52 -0000
@@ -54,7 +54,7 @@
     var fieldName = this.name.replace(/^files\[([a-z0-9_]+)_\d+\]$/, '$1');
     var extensions = '';
     if (Drupal.settings.filefield && Drupal.settings.filefield[fieldName]) {
-      extensions = Drupal.settings.filefield[fieldName].replace(/,\s*/g, '|');
+      extensions = Drupal.settings.filefield[fieldName].replace(/[, ]+/g, '|');
     }
     if (extensions.length > 1 && this.value.length > 0) {
       var extensionPattern = new RegExp('\\.(' + extensions + ')$', 'gi');