The wife noticed some water collecting around the base of one of the toilets, so I think I'm going to have to add some basic plumbing to my knowledge base. It doesn't look too difficult from what I see in the Home Depot Home Improvement book. Turn the water supply off, make sure the water is gone from the tank and bowl, undo the water line and a couple of bolts and pull the toilet off. I suspect a problem with the wax seal, so hopefully it's something simple to fix. Pop a new seal on, stick the toilet back on and fasten everything back up again.
Hopefully I don't flood the place.