Synaptic error

[paul marwick]

Every time I run Synaptic on one machine, I get an errorbox with the
following:

W: GPG error: http://archive.ubuntu.com hoary Release: The following
signatures were invalid: 
BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key 
<ftpmaster at ubuntu.com>

How do I fix this?

paul.

-- 
paulm at waitrose.com
Marwick Computer Services - Chipping Norton, Oxfordshire, UK
OS/2, LAN and general Computer Consultants