mgsql periodic script? running vacuumdb?

[Lane]

Hello,

I recently installed postgresql 8.0 on FreeBSD 5.4 and I've noticed the 
following message in the "daily run output":

vacuuming...
Password: 
vacuumdb: could not connect to database template1: fe_sendauth: no password 
supplied

Errors were reported during vacuum.

I know how to fix the promblem (i.e. ~/.pgpass) but what I don't understand is 
who or what is invoking vacuumdb.

The message appears in the output generated from the scripts 
at /etc/periodic/daily but there is no reference to vacuumdb in any of those 
scripts.

Who's doing this?

Thanks,

Lane