Index: modules/comment/comment.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/comment/comment.module,v
retrieving revision 1.814
diff -u -p -r1.814 comment.module
--- modules/comment/comment.module	4 Dec 2009 16:49:46 -0000	1.814
+++ modules/comment/comment.module	9 Dec 2009 21:43:56 -0000
@@ -1940,7 +1940,7 @@ function comment_form_validate($form, &$
         $query = db_select('users', 'u');
         $query->addField('u', 'uid', 'uid');
         $taken = $query
-          ->where('LOWER(name) = :name', array(':name' => $form_state['values']['name']))
+          ->condition('name', $form_state['values']['name'], 'LIKE')
           ->countQuery()
           ->execute()
           ->fetchField();
Index: modules/profile/profile.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/profile/profile.admin.inc,v
retrieving revision 1.36
diff -u -p -r1.36 profile.admin.inc
--- modules/profile/profile.admin.inc	2 Dec 2009 14:56:32 -0000	1.36
+++ modules/profile/profile.admin.inc	9 Dec 2009 21:43:56 -0000
@@ -419,7 +419,7 @@ function profile_field_delete_submit($fo
  */
 function profile_admin_settings_autocomplete($string) {
   $matches = array();
-  $result = db_query_range("SELECT category FROM {profile_field} WHERE LOWER(category) LIKE LOWER(:category)", 0, 10, array(':category' => $string . '%'));
+  $result = db_query_range("SELECT category FROM {profile_field} WHERE category LIKE :category", 0, 10, array(':category' => $string . '%'));
   foreach ($result as $data) {
     $matches[$data->category] = check_plain($data->category);
   }
Index: modules/profile/profile.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/profile/profile.module,v
retrieving revision 1.283
diff -u -p -r1.283 profile.module
--- modules/profile/profile.module	6 Dec 2009 18:24:29 -0000	1.283
+++ modules/profile/profile.module	9 Dec 2009 21:43:56 -0000
@@ -611,8 +611,7 @@ function _profile_get_fields($category, 
     $query->condition('register', 1);
   }
   else {
-    // Use LOWER(:category) instead of PHP's strtolower() to avoid UTF-8 conversion issues.
-    $query->where('LOWER(category) = LOWER(:category)', array(':category' => $category));
+    $query->condition('category', $category, 'LIKE');
   }
   if (!user_access('administer users')) {
     $query->condition('visibility', PROFILE_HIDDEN, '<>');
Index: modules/profile/profile.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/profile/profile.pages.inc,v
retrieving revision 1.21
diff -u -p -r1.21 profile.pages.inc
--- modules/profile/profile.pages.inc	9 Oct 2009 01:00:02 -0000	1.21
+++ modules/profile/profile.pages.inc	9 Dec 2009 21:43:56 -0000
@@ -125,7 +125,7 @@ function profile_autocomplete($field, $s
   $matches = array();
   $autocomplete_field = (bool) db_query_range("SELECT 1 FROM {profile_field} WHERE fid = :fid AND autocomplete = 1", 0, 1, array(':fid' => $field))->fetchField();
   if ($autocomplete_field) {
-    $values = db_query_range("SELECT value FROM {profile_value} WHERE fid = :fid AND LOWER(value) LIKE LOWER(:value) GROUP BY value ORDER BY value ASC", 0, 10, array(
+    $values = db_query_range("SELECT value FROM {profile_value} WHERE fid = :fid AND value LIKE :value GROUP BY value ORDER BY value ASC", 0, 10, array(
       ':fid' => $field,
       ':value' => $string . '%',
     ))->fetchCol();
Index: modules/user/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.module,v
retrieving revision 1.1089
diff -u -p -r1.1089 user.module
--- modules/user/user.module	7 Dec 2009 03:45:16 -0000	1.1089
+++ modules/user/user.module	9 Dec 2009 21:43:57 -0000
@@ -755,9 +755,12 @@ function user_access($string, $account =
  * @return boolean TRUE for blocked users, FALSE for active.
  */
 function user_is_blocked($name) {
-  $deny = db_query("SELECT name FROM {users} WHERE status = 0 AND name = LOWER(:name)", array(':name' => $name))->fetchObject();
-
-  return $deny;
+  return db_select('users')
+    ->fields('users', array('name'))
+    ->condition('name', $name, 'LIKE')
+    ->condition('status', 0)
+    ->execute()
+    ->fetchObject();
 }
 
 /**
Index: modules/user/user.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.pages.inc,v
retrieving revision 1.62
diff -u -p -r1.62 user.pages.inc
--- modules/user/user.pages.inc	1 Dec 2009 16:03:35 -0000	1.62
+++ modules/user/user.pages.inc	9 Dec 2009 21:43:57 -0000
@@ -12,7 +12,7 @@
 function user_autocomplete($string = '') {
   $matches = array();
   if ($string) {
-    $result = db_query_range("SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER(:name)", 0, 10, array(':name' => $string . '%'));
+    $result = db_query_range("SELECT name FROM {users} WHERE name LIKE :name", 0, 10, array(':name' => $string . '%'));
     foreach ($result as $user) {
       $matches[$user->name] = check_plain($user->name);
     }