gpg: Warning: using insecure memory!

[Jan Houtsma]

I dont know anything ab gpg. After installing a clean RH7.0 which 
includes mutt-1.2.5i-3 i always get the following warnings
if i view a gpg signed message:

"gpg: Warning: using insecure memory!
 gpg: Signature made Mon 09 Oct 2000 02:07:06 AM CEST using DSA key ID FC5C7370
 gpg: Can't check signature: public key not found"

Prolly gpg is not quite supported or i havent configured it yet?
What do i need to suppress this. 
thanks,
jan
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