Index: page_title.module
===================================================================
--- page_title.module
+++ page_title.module
@@ -247,17 +247,17 @@
   switch ($op) {
     case 'update':
       if (user_access('set page title')) {
-        db_query('DELETE FROM {page_title} WHERE type = "node" AND id = %d', $node->nid);
+        db_query('DELETE FROM {page_title} WHERE type = \'node\' AND id = %d', $node->nid);
       }
       // fallthrough to insert intentional!
     case 'insert':
       if (isset($node->page_title) && drupal_strlen(trim($node->page_title)) > 0 && user_access('set page title')) {
-        db_query('INSERT INTO {page_title} VALUES ("node", %d, "%s")', $node->nid, $node->page_title);
+        db_query('INSERT INTO {page_title} VALUES (\'node\', %d, \'%s\')', $node->nid, $node->page_title);
       }
       break;
 
     case 'delete':
-      db_query('DELETE FROM {page_title} WHERE type = "node" AND id = %d', $node->nid);
+      db_query('DELETE FROM {page_title} WHERE type = \'node\' AND id = %d', $node->nid);
       break;
 
     case 'load':
@@ -275,17 +275,17 @@
   switch ($op) {
     case 'update':
       if (user_access('set page title')) {
-        db_query('DELETE FROM {page_title} WHERE type = "term" AND id = %d', $edit['tid']);
+        db_query('DELETE FROM {page_title} WHERE type = \'term\' AND id = %d', $edit['tid']);
       }
       // Fallthrough to insert is intentional!
     case 'insert':
       if (isset($edit['page_title']) && drupal_strlen(trim($edit['page_title'])) > 0 && user_access('set page title')) {
-        db_query('INSERT INTO {page_title} VALUES("term", %d, "%s")', $edit['tid'], $edit['page_title']);
+        db_query('INSERT INTO {page_title} VALUES(\'term\', %d, \'%s\')', $edit['tid'], $edit['page_title']);
       }
       break;
 
     case 'delete':
-      db_query('DELETE FROM {page_title} WHERE type = "term" AND id = %d', $edit['tid']);
+      db_query('DELETE FROM {page_title} WHERE type = \'term\' AND id = %d', $edit['tid']);
       break;
   }
 }
@@ -298,17 +298,17 @@
   switch ($op) {
     case 'update':
       if (user_access('set page title')) {
-        db_query('DELETE FROM {page_title} WHERE type = "user" AND id = %d', $account->uid);
+        db_query('DELETE FROM {page_title} WHERE type = \'user\' AND id = %d', $account->uid);
       }
       // Fallthrough to insert is intentional!
     case 'insert':
       if (isset($edit['page_title']) && drupal_strlen(trim($edit['page_title'])) > 0 && user_access('set page title')) {
-        db_query('INSERT INTO {page_title} VALUES("user", %d, "%s")', $account->uid, $edit['page_title']);
+        db_query('INSERT INTO {page_title} VALUES(\'user\', %d, \'%s\')', $account->uid, $edit['page_title']);
       }
       break;
 
     case 'delete':
-      db_query('DELETE FROM {page_title} WHERE type = "user" AND id = %d', $account->uid);
+      db_query('DELETE FROM {page_title} WHERE type = \'user\' AND id = %d', $account->uid);
       break;
   }
 }
@@ -387,7 +387,7 @@
  *   string the page title for the given type & id.
  */
 function page_title_load_title($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));
 }