=== modified file 'modules/comment/comment.module'
--- modules/comment/comment.module	2007-07-02 14:41:34 +0000
+++ modules/comment/comment.module	2007-07-03 19:06:13 +0000
@@ -1446,7 +1446,7 @@ function comment_validate($edit) {
   if (!$user->uid || isset($edit['is_anonymous'])) {
     if (variable_get('comment_anonymous', COMMENT_ANONYMOUS_MAYNOT_CONTACT) > COMMENT_ANONYMOUS_MAYNOT_CONTACT) {
       if ($edit['name']) {
-        $taken = db_result(db_query("SELECT COUNT(uid) FROM {users} WHERE LOWER(name) = '%s'", $edit['name']), 0);
+        $taken = db_result(db_query("SELECT COUNT(uid) FROM {users} WHERE name = '%s'", $edit['name']), 0);
 
         if ($taken != 0) {
           form_set_error('name', t('The name you used belongs to a registered user.'));

=== modified file 'modules/profile/profile.module'
--- modules/profile/profile.module	2007-07-01 17:41:14 +0000
+++ modules/profile/profile.module	2007-07-03 19:08:01 +0000
@@ -744,7 +744,7 @@ function profile_form_profile($edit, $us
 function profile_autocomplete($field, $string) {
   $matches = array();
   if (db_result(db_query("SELECT COUNT(*) FROM {profile_fields} WHERE fid = %d AND autocomplete = 1", $field))) {
-    $result = db_query_range("SELECT value FROM {profile_values} WHERE fid = %d AND LOWER(value) LIKE LOWER('%s%%') GROUP BY value ORDER BY value ASC", $field, $string, 0, 10);
+    $result = db_query_range("SELECT value FROM {profile_values} WHERE fid = %d AND value LIKE '%s%%' GROUP BY value ORDER BY value ASC", $field, $string, 0, 10);
     while ($data = db_fetch_object($result)) {
       $matches[$data->value] = check_plain($data->value);
     }
@@ -848,8 +848,7 @@ function _profile_get_fields($category, 
     $filters[] = 'register = 1';
   }
   else {
-    // Use LOWER('%s') instead of PHP's strtolower() to avoid UTF-8 conversion issues.
-    $filters[] = "LOWER(category) = LOWER('%s')";
+    $filters[] = "category = '%s'";
     $args[] = $category;
   }
   if (!user_access('administer users')) {
@@ -866,7 +865,7 @@ function _profile_get_fields($category, 
  */
 function profile_admin_settings_autocomplete($string) {
   $matches = array();
-  $result = db_query_range("SELECT category FROM {profile_fields} WHERE LOWER(category) LIKE LOWER('%s%%')", $string, 0, 10);
+  $result = db_query_range("SELECT category FROM {profile_fields} WHERE category LIKE '%s%%'", $string, 0, 10);
   while ($data = db_fetch_object($result)) {
     $matches[$data->category] = check_plain($data->category);
   }

=== modified file 'modules/statistics/statistics.module'
--- modules/statistics/statistics.module	2007-07-01 17:41:14 +0000
+++ modules/statistics/statistics.module	2007-07-03 19:07:14 +0000
@@ -329,7 +329,7 @@ function statistics_top_visitors() {
     array('data' => t('Operations'))
   );
 
-  $sql = "SELECT COUNT(a.uid) AS hits, a.uid, u.name, a.hostname, SUM(a.timer) AS total, ac.aid FROM {accesslog} a LEFT JOIN {access} ac ON ac.type = 'host' AND LOWER(a.hostname) LIKE (ac.mask) LEFT JOIN {users} u ON a.uid = u.uid GROUP BY a.hostname, a.uid, u.name, ac.aid". tablesort_sql($header);
+  $sql = "SELECT COUNT(a.uid) AS hits, a.uid, u.name, a.hostname, SUM(a.timer) AS total, ac.aid FROM {accesslog} a LEFT JOIN {access} ac ON ac.type = 'host' AND a.hostname LIKE ac.mask LEFT JOIN {users} u ON a.uid = u.uid GROUP BY a.hostname, a.uid, u.name, ac.aid". tablesort_sql($header);
   $sql_cnt = "SELECT COUNT(DISTINCT(CONCAT(uid, hostname))) FROM {accesslog}";
   $result = pager_query($sql, 30, 0, $sql_cnt);
 

=== modified file 'modules/taxonomy/taxonomy.module'
--- modules/taxonomy/taxonomy.module	2007-07-02 17:08:35 +0000
+++ modules/taxonomy/taxonomy.module	2007-07-03 19:07:51 +0000
@@ -1122,7 +1122,7 @@ function _taxonomy_term_children($tid) {
  *   An array of matching term objects.
  */
 function taxonomy_get_term_by_name($name) {
-  $db_result = db_query(db_rewrite_sql("SELECT t.tid, t.* FROM {term_data} t WHERE LOWER('%s') LIKE LOWER(t.name)", 't', 'tid'), trim($name));
+  $db_result = db_query(db_rewrite_sql("SELECT t.tid, t.* FROM {term_data} t WHERE '%s' = t.name", 't', 'tid'), trim($name));
   $result = array();
   while ($term = db_fetch_object($db_result)) {
     $result[] = $term;
@@ -1511,7 +1511,7 @@ function taxonomy_autocomplete($vid, $st
   $last_string = trim(array_pop($array));
   $matches = array();
   if ($last_string != '') {
-    $result = db_query_range(db_rewrite_sql("SELECT t.tid, t.name FROM {term_data} t WHERE t.vid = %d AND LOWER(t.name) LIKE LOWER('%%%s%%')", 't', 'tid'), $vid, $last_string, 0, 10);
+    $result = db_query_range(db_rewrite_sql("SELECT t.tid, t.name FROM {term_data} t WHERE t.vid = %d AND t.name LIKE '%%%s%%'", 't', 'tid'), $vid, $last_string, 0, 10);
 
     $prefix = count($array) ? implode(', ', $array) .', ' : '';
 

=== modified file 'modules/user/user.module'
--- modules/user/user.module	2007-07-02 14:41:34 +0000
+++ modules/user/user.module	2007-07-03 19:09:29 +0000
@@ -144,7 +144,7 @@ function user_load($array = array()) {
       $params[] = md5($value);
     }
     else {
-      $query[]= "LOWER($key) = LOWER('%s')";
+      $query[]= $key ." = '%s'";
       $params[] = $value;
     }
   }
@@ -463,7 +463,7 @@ function user_access($string, $account =
  * @return boolean TRUE for blocked users, FALSE for active
  */
 function user_is_blocked($name) {
-  $deny  = db_fetch_object(db_query("SELECT name FROM {users} WHERE status = 0 AND name = LOWER('%s')", $name));
+  $deny  = db_fetch_object(db_query("SELECT name FROM {users} WHERE status = 0 AND name = '%s'", $name));
 
   return $deny;
 }
@@ -520,13 +520,13 @@ function user_search($op = 'search', $ke
         $keys = preg_replace('!\*+!', '%', $keys);
         if (user_access('administer users')) {
           // Administrators can also search in the otherwise private email field.
-          $result = pager_query("SELECT name, uid, mail FROM {users} WHERE LOWER(name) LIKE LOWER('%%%s%%') OR LOWER(mail) LIKE LOWER('%%%s%%')", 15, 0, NULL, $keys, $keys);
+          $result = pager_query("SELECT name, uid, mail FROM {users} WHERE name LIKE '%%%s%%' OR mail LIKE '%%%s%%'", 15, 0, NULL, $keys, $keys);
           while ($account = db_fetch_object($result)) {
             $find[] = array('title' => $account->name .' ('. $account->mail .')', 'link' => url('user/'. $account->uid, array('absolute' => TRUE)));
           }
         }
         else {
-          $result = pager_query("SELECT name, uid FROM {users} WHERE LOWER(name) LIKE LOWER('%%%s%%')", 15, 0, NULL, $keys);
+          $result = pager_query("SELECT name, uid FROM {users} WHERE name LIKE '%%%s%%'", 15, 0, NULL, $keys);
           while ($account = db_fetch_object($result)) {
             $find[] = array('title' => $account->name, 'link' => url('user/'. $account->uid, array('absolute' => TRUE)));
           }
@@ -1547,7 +1547,7 @@ function _user_edit_validate($uid, &$edi
     if ($error = user_validate_name($edit['name'])) {
       form_set_error('name', $error);
     }
-    else if (db_num_rows(db_query("SELECT uid FROM {users} WHERE uid != %d AND LOWER(name) = LOWER('%s')", $uid, $edit['name'])) > 0) {
+    else if (db_num_rows(db_query("SELECT uid FROM {users} WHERE uid != %d AND name = '%s'", $uid, $edit['name'])) > 0) {
       form_set_error('name', t('The name %name is already taken.', array('%name' => $edit['name'])));
     }
     else if (drupal_is_denied('user', $edit['name'])) {
@@ -1559,7 +1559,7 @@ function _user_edit_validate($uid, &$edi
   if ($error = user_validate_mail($edit['mail'])) {
     form_set_error('mail', $error);
   }
-  else if (db_num_rows(db_query("SELECT uid FROM {users} WHERE uid != %d AND LOWER(mail) = LOWER('%s')", $uid, $edit['mail'])) > 0) {
+  else if (db_num_rows(db_query("SELECT uid FROM {users} WHERE uid != %d AND mail = '%s'", $uid, $edit['mail'])) > 0) {
     form_set_error('mail', t('The e-mail address %email is already registered. <a href="@password">Have you forgotten your password?</a>', array('%email' => $edit['mail'], '@password' => url('user/password'))));
   }
   else if (drupal_is_denied('mail', $edit['mail'])) {
@@ -2862,7 +2862,7 @@ function _user_forms(&$edit, $account, $
 function user_autocomplete($string = '') {
   $matches = array();
   if ($string) {
-    $result = db_query_range("SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER('%s%%')", $string, 0, 10);
+    $result = db_query_range("SELECT name FROM {users} WHERE name LIKE '%s%%'", $string, 0, 10);
     while ($user = db_fetch_object($result)) {
       $matches[$user->name] = check_plain($user->name);
    }