CLASSEMENT de "utf8_general_ci" n'est pas valide pour le JEU de CARACTÈRES 'binaire'?

mysql> SELECT LOCATE("n", "München") COLLATE utf8_general_ci;
ERROR 1253 (42000): COLLATION 'utf8_general_ci' is not valid for CHARACTER SET 'binary'

Comment puis-je me débarrasser de cette erreur?

Ce que j'ai déjà essayé (copie&coller):

$ mysql -u admin -p $DATABASE
Enter password:
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.69 Source distribution

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mysql> SELECT LOCATE("n", "München") COLLATE utf8_general_ci;
ERROR 1253 (42000): COLLATION 'utf8_general_ci' is not valid for CHARACTER SET 'binary'
mysql> SET NAMES utf8;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT LOCATE("n", "München") COLLATE utf8_general_ci;
ERROR 1253 (42000): COLLATION 'utf8_general_ci' is not valid for CHARACTER SET 'binary'
mysql> SELECT LOCATE(_utf8"n", _utf8"München") COLLATE utf8_general_ci;
ERROR 1253 (42000): COLLATION 'utf8_general_ci' is not valid for CHARACTER SET 'binary'
mysql> SHOW VARIABLES LIKE "character_set_database";
+------------------------+-------+
| Variable_name          | Value |
+------------------------+-------+
| character_set_database | utf8  |
+------------------------+-------+
1 row in set (0.00 sec)

OriginalL'auteur feklee | 2013-05-22