password function returning different values

[roseymysql.20.ftumsh]

Lo all,

mysql 4.1.13 standard log on Red Hat Enterprise Linux ES release 3 (Taroon Update 5)
It's a standard rpm download binary.

I have two servers, TEST(port 3308) and LIVE (port 3307).

When I connect to TEST and do:
select password('a');

I get:
60671c896665c3fa

When I connect to LIVE and do:
select password('a');

I get:
*667F407DE7C6AD07358FA38DAED7828A72014B4E

Both connections are on the RH box using the same client. Settings in my.cnf are identical. The old_password switch isn't in use.

Why the difference?

Thx

John