Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.419
diff -u -p -r1.419 system.module
--- modules/system/system.module	7 Dec 2006 19:11:36 -0000	1.419
+++ modules/system/system.module	8 Dec 2006 07:38:39 -0000
@@ -1508,7 +1508,7 @@ function theme_system_modules($form) {
   // Pull package information from module list and start grouping modules.
   $modules = $form['validation_modules']['#value'];
   foreach ($modules as $module) {
-    if (!isset($module->info['package'])) {
+    if (!isset($module->info['package']) || !$module->info['package']) {
       $module->info['package'] = 'Other';
     }
     $packages[$module->info['package']][$module->name] = $module->info;