On Fri, 02 Apr 2010 21:14:33 -0400, wrote:

[snip]

http://en.wikipedia.org/wiki/Phantom_voltage
Or simply put a half meg-ohm or higher resistance across the leads of
your digital meter. It will "kill the Phantom"

It would be a good idea for meters to include such a feature. If the
reading changes, you know you've got a problem.