Index: views_query.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/views/views_query.inc,v
retrieving revision 1.48.2.5
diff -u -F^f -r1.48.2.5 views_query.inc
--- views_query.inc	14 Nov 2006 06:52:45 -0000	1.48.2.5
+++ views_query.inc	29 Nov 2006 04:50:11 -0000
@@ -374,7 +374,7 @@ function _views_build_summary(&$query, $
     }
 
     foreach($field as $f) {
-      $as = $alias . '_' . $f;
+      $as = strtr($alias . '_' . $f, array('()' => ''));
       $this->add_field($f, $table, $as);
       $this->orderby[] = "$as $order";
     }