lots of problems with apt-get deb verification

[iain d broadfoot <ibroadfo@cis.strath.ac.uk>]

running a testing/unstable laptop, doing an upgrade + grabbing some ssl 
thingys.

apt-get install pavuk:

*********************************************************************
Authenticating /var/cache/apt/archives/libsocks4_4.3.beta2-13_i386.deb ...
debsig: Origin Signature check failed. This deb might not be signed.

dpkg: error processing 
/var/cache/apt/archives/libsocks4_4.3.beta2-13_i386.deb (--unpack):
 Verification on package 
/var/cache/apt/archives/libsocks4_4.3.beta2-13_i386.deb failed!
Authenticating /var/cache/apt/archives/pavuk_0.9pl28-2_i386.deb ...
debsig: Origin Signature check failed. This deb might not be signed.

dpkg: error processing /var/cache/apt/archives/pavuk_0.9pl28-2_i386.deb 
(--unpack):
 Verification on package 
/var/cache/apt/archives/pavuk_0.9pl28-2_i386.deb failed!
Errors were encountered while processing:
 /var/cache/apt/archives/libsocks4_4.3.beta2-13_i386.deb
 /var/cache/apt/archives/pavuk_0.9pl28-2_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

***********************************************************************

i've cleaned the cache + re-downloaded the files.

should i try another server??

could there be breakage in the verification step?

cheers,

a confuzzled iain