Index: modules/taxonomy/views_plugin_argument_default_taxonomy_tid.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/views/modules/taxonomy/Attic/views_plugin_argument_default_taxonomy_tid.inc,v
retrieving revision 1.1.4.3
diff -u -p -r1.1.4.3 views_plugin_argument_default_taxonomy_tid.inc
--- modules/taxonomy/views_plugin_argument_default_taxonomy_tid.inc	29 Apr 2010 18:36:14 -0000	1.1.4.3
+++ modules/taxonomy/views_plugin_argument_default_taxonomy_tid.inc	20 Dec 2010 19:44:43 -0000
@@ -98,6 +98,13 @@ class views_plugin_argument_default_taxo
         }
       }
     }
+
+    // If the current page is a view that takes tid as an argument,
+    // find the tid argument and return it.
+    $views_page = views_get_page_view();
+    if ($views_page && isset($views_page->view->argument['tid'])) {
+      return $views_page->view->argument['tid']->argument;
+    }
   }
 }