Sarge security issue! invalid signatures on debs

[Hanasaki JiJi <hanasaki@hanaden.com>]

Hello all,

Just did an apt-get update; apt-get upgrade;apt-get install eterm

the install eterm is issueing the following errors on the .deb's signatures.

The following extra packages will be installed:
  libast1 libimlib2 libttf2
The following NEW packages will be installed:
  libast1 libimlib2 libttf2
0 packages upgraded, 3 newly installed, 0 to remove and 0  not upgraded.
1 packages not fully installed or removed.
Need to get 0B/306kB of archives. After unpacking 1016kB will be used.
Do you want to continue? [Y/n]
E: Invalid archive signature
E: Invalid archive signature
E: Invalid archive signature
dpkg-deb: `/var/cache/apt/archives/libttf2_1.4pre.20011029-1_i386.deb' 
is not a
debian format archive
dpkg: error processing 
/var/cache/apt/archives/libttf2_1.4pre.20011029-1_i386.de
b (--unpack):
 subprocess dpkg-deb --control returned error exit status 2
dpkg-deb: `/var/cache/apt/archives/libimlib2_1.0.5-2_i386.deb' is not a 
debian f
ormat archive
dpkg: error processing 
/var/cache/apt/archives/libimlib2_1.0.5-2_i386.deb (--unp
ack):
 subprocess dpkg-deb --control returned error exit status 2
dpkg-deb: `/var/cache/apt/archives/libast1_0.4-3_i386.deb' is not a 
debian forma
t archive
dpkg: error processing /var/cache/apt/archives/libast1_0.4-3_i386.deb 
(--unpack)
:
 subprocess dpkg-deb --control returned error exit status 2
Errors were encountered while processing:
 /var/cache/apt/archives/libttf2_1.4pre.20011029-1_i386.deb
 /var/cache/apt/archives/libimlib2_1.0.5-2_i386.deb
 /var/cache/apt/archives/libast1_0.4-3_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)