MySQl4.1:::login without a password???

[Henry]

After installing MySQL4.1, I created a test account and then I could
login without providing a password. When using MySQL4.0, I had to
provide a password for the same test account. Any clue? I need to
inforce the usage of passwords. Thank you.

/************************************************** */
mysql> GRANT ALL PRIVILEGES ON *.* TO 'lab3'@'%' IDENTIFIED BY 'lab3'
WITH GRANT OPTION;
Query OK, 0 rows affected (0.10 sec)

mysql> exit
Bye

C:\mysql\bin>mysql -u lab3
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2 to server version: 4.1.7

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql>