apt-cdrom add "gpgv: Can't check signature: public key not found"

[Matt Zimmerman]

On Sat, Apr 16, 2005 at 08:12:30PM +0800, rpowersau at gmail.com wrote:
> Hi, 
> 
> When I try to use 'apt-cdrom add' with my hoary cd, I get the above
> error. I've tried goggling it with no luck. Anybody know what this
> means or how to fix it?

Please cut and paste the exact error message, and also send the output of
"apt-key list".

-- 
 - mdz