Index: apachesolr.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/apachesolr/apachesolr.module,v
retrieving revision 1.1.2.12.2.182
diff -u -p -r1.1.2.12.2.182 apachesolr.module
--- apachesolr.module	2 Jan 2010 13:48:14 -0000	1.1.2.12.2.182
+++ apachesolr.module	24 Feb 2010 22:02:12 -0000
@@ -1537,7 +1537,8 @@ function theme_apachesolr_facet_list($it
       if (!is_array($hidden_item)) {
         $hidden_item = array('data' => $hidden_item);
       }
-      $items[] = $hidden_item + array('class' => 'apachesolr-hidden-facet');
+      $hidden_item['class'] = isset($hidden_item['class']) ? $hidden_item['class'] . ' apachesolr-hidden-facet' : 'apachesolr-hidden-facet';
+      $items[] = $hidden_item;
     }
   }
   $admin_link = '';