Index: ezpublish_legacy/kernel/classes/ezcontentobjecttreenode.php
===================================================================
--- ezpublish_legacy/kernel/classes/ezcontentobjecttreenode.php	(date 1363178162000)
+++ ezpublish_legacy/kernel/classes/ezcontentobjecttreenode.php	(revision )
@@ -889,11 +889,17 @@
             $sql = '';
             foreach ( $alphabet as $letter )
             {
-                $sql .= " AND ezcontentobject_name.name NOT LIKE '". $db->escapeString( $letter ) . "%' ";
+                $sql .= "
+                    AND (ezcontentobject_name.name NOT LIKE '". $db->escapeString( mb_strtolower( $letter ) ) . "%'
+                    AND ezcontentobject_name.name NOT LIKE '". $db->escapeString( mb_strtoupper( $letter ) ) . "%')
+                ";
             }
             return $sql;
         }
-        $objectNameFilterSQL =  " AND ezcontentobject_name.name LIKE '" . $db->escapeString( $filter ) ."%'";
+        $objectNameFilterSQL = "
+            AND (ezcontentobject_name.name LIKE '" . $db->escapeString( mb_strtolower( $filter ) ) ."%'
+            OR ezcontentobject_name.name LIKE '" . $db->escapeString( mb_strtoupper( $filter ) ) ."%')
+        ";
         return $objectNameFilterSQL;
     }