On Sun, 15 Jul 2007 06:55:25 -0700, photoflavor
wrote:

Greetings. As a new homeowner (moved in 6 days ago), I have already

It's probably the drain, because if it were the supply, it probably
would have been leaking since the plumber finished.

You moved in adn started using the plumbing, so now the drain is
carrying water. If so, and you are positive which drain is leaking,
just don't use it anymore.