Index: page_title.module
===================================================================
--- page_title.module
+++ page_title.module
@@ -347,7 +347,7 @@
  *   string the page title for the given type & id.
  */
 function page_title_load_title($id, $type) {
-  return db_result(db_query('SELECT page_title FROM {page_title} WHERE type = "%s" AND id = %d', $type, $id));
+  return db_result(db_query('SELECT page_title FROM {page_title} WHERE type = \'%s\' AND id = %d', $type, $id));
 }