When I connect MySQL successfully, I just add a new user, but failed, and logs for the domain said:
 Thu, 01 Apr 2010 17:18:10 Mysql database is closed.
 Thu, 01 Apr 2010 17:18:10 Mysql database connected successfully.
 Thu, 01 Apr 2010 17:18:38 Database query error: Column count doesn't match value count at row 1.
The database schema of MySQL is copied from system help: http://127.0.0.1:5466/help/english/index.html
I just checked database schema and MySQL status and so on, but no help. I dont know whether this is a bug.