When I put Vista to sleep, it usually wakes itself up, often after only a
few minutes. A low-power feature isn't worth anything if it won't stay in
low-power mode.

When Vista wakes itself up, powercfg doesn't give any useful info:

C:\stuff>powercfg -lastwake
Wake History Count - 1
Wake History [0]
Wake Source Count - 0

The System Log has this entry:

Event ID: 1
The system has resumed from sleep.
Wake Source: Unknown

and whenever Vista wakes itself up, the Event ID 1 entry is always preceded
by:

Event ID: 104
The service is publishing to the network.
Keywords: Event originating from the fdrespub service
Source: Resource Publication

Is there a way to prevent Resource Publication (whatever that is) from
waking Vista up?

Thanks,
Sam