This afternoon I got a phone call from
Oops.
The solution is to have the electricians bring a ground wire out from the box so that everyone else can bond to it. At least that's what the Qwest guy said. Pam is on vacation this week, so I called Susan and asked her to get hold of Pam's boss. I think this is pretty urgent: it's a problem on several houses in our neighborhood, and I suspect in some of Centex's other sites as well.