Index: Solr_Base_Query.php
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/apachesolr/Solr_Base_Query.php,v
retrieving revision 1.1.4.35
diff -u -p -r1.1.4.35 Solr_Base_Query.php
--- Solr_Base_Query.php	11 Jun 2009 12:39:05 -0000	1.1.4.35
+++ Solr_Base_Query.php	18 Jun 2009 19:24:50 -0000
@@ -181,7 +181,7 @@ class Solr_Base_Query implements Drupal_
 
   public function has_filter($name, $value) {
     foreach ($this->fields as $pos => $values) {
-      if (!empty($values['#name']) && !empty($values['#value']) && $values['#name'] == $name && $values['#value'] == $value) {
+      if (isset($values['#name']) && isset($values['#value']) && $values['#name'] == $name && $values['#value'] == $value) {
         return TRUE;
       }
     }