This fixes http://opensimulator.org/mantis/view.php?id=7123
Users that use MySQL should change their MySQL configuration to support UTF8. In the config file /etc/my.cnf (Linux) or my.ini (Windows), add these settings:
[mysqld]
character-set-server=utf8
[client]
default-character-set=utf8
And then restart MySQL (on Linux: "sudo service mysqld restart").